diff --git a/develop/testing/pairs_tests.lua b/develop/testing/pairs_tests.lua
index 2204a9d..bcd1238 100644
--- a/develop/testing/pairs_tests.lua
+++ b/develop/testing/pairs_tests.lua
@@ -99,3 +99,315 @@ do
     assert(evo.get(evo.pair(p1, s1), p1) == nil)
     assert(evo.get(evo.pair(p1, s1), s1) == nil)
 end
+
+do
+    local p, s1, s2 = evo.id(3)
+
+    do
+        local e = evo.builder()
+            :set(evo.pair(p, s1), 21)
+            :set(evo.pair(p, s2), 42)
+            :spawn()
+
+        evo.remove(e, evo.pair(p, s1))
+
+        assert(not evo.has(e, evo.pair(p, s1)))
+        assert(evo.get(e, evo.pair(p, s1)) == nil)
+
+        assert(evo.has(e, evo.pair(p, s2)))
+        assert(evo.get(e, evo.pair(p, s2)) == 42)
+
+        evo.remove(e, evo.pair(p, s2))
+
+        assert(not evo.has(e, evo.pair(p, s2)))
+        assert(evo.get(e, evo.pair(p, s2)) == nil)
+
+        assert(not evo.has(e, evo.pair(p, s2)))
+        assert(evo.get(e, evo.pair(p, s2)) == nil)
+    end
+
+    do
+        local e = evo.builder()
+            :set(evo.pair(p, s1), 21)
+            :set(evo.pair(p, s2), 42)
+            :spawn()
+
+        evo.remove(e, evo.pair(p, s2))
+
+        assert(evo.has(e, evo.pair(p, s1)))
+        assert(evo.get(e, evo.pair(p, s1)) == 21)
+
+        assert(not evo.has(e, evo.pair(p, s2)))
+        assert(evo.get(e, evo.pair(p, s2)) == nil)
+
+        evo.remove(e, evo.pair(p, s1))
+
+        assert(not evo.has(e, evo.pair(p, s1)))
+        assert(evo.get(e, evo.pair(p, s1)) == nil)
+
+        assert(not evo.has(e, evo.pair(p, s2)))
+        assert(evo.get(e, evo.pair(p, s2)) == nil)
+    end
+end
+
+do
+    local p1, p2, s1, s2 = evo.id(4)
+
+    do
+        local e = evo.builder()
+            :set(evo.pair(p1, s1), 11)
+            :set(evo.pair(p1, s2), 12)
+            :set(evo.pair(p2, s1), 21)
+            :set(evo.pair(p2, s2), 22)
+            :spawn()
+
+        evo.remove(e, evo.pair(p1, evo.ANY))
+
+        assert(not evo.has(e, evo.pair(p1, s1)))
+        assert(not evo.has(e, evo.pair(p1, s2)))
+        assert(not evo.has(e, evo.pair(p1, evo.ANY)))
+
+        assert(evo.has(e, evo.pair(p2, s1)))
+        assert(evo.get(e, evo.pair(p2, s1)) == 21)
+        assert(evo.has(e, evo.pair(p2, s2)))
+        assert(evo.get(e, evo.pair(p2, s2)) == 22)
+        assert(evo.has(e, evo.pair(p2, evo.ANY)))
+    end
+
+    do
+        local e = evo.builder()
+            :set(evo.pair(p1, s1), 11)
+            :set(evo.pair(p1, s2), 12)
+            :set(evo.pair(p2, s1), 21)
+            :set(evo.pair(p2, s2), 22)
+            :spawn()
+
+        evo.remove(e, evo.pair(p2, evo.ANY))
+
+        assert(not evo.has(e, evo.pair(p2, s1)))
+        assert(not evo.has(e, evo.pair(p2, s2)))
+        assert(not evo.has(e, evo.pair(p2, evo.ANY)))
+
+        assert(evo.has(e, evo.pair(p1, s1)))
+        assert(evo.get(e, evo.pair(p1, s1)) == 11)
+        assert(evo.has(e, evo.pair(p1, s2)))
+        assert(evo.get(e, evo.pair(p1, s2)) == 12)
+        assert(evo.has(e, evo.pair(p1, evo.ANY)))
+    end
+
+    do
+        local e = evo.builder()
+            :set(evo.pair(p1, s1), 11)
+            :set(evo.pair(p1, s2), 12)
+            :set(evo.pair(p2, s1), 21)
+            :set(evo.pair(p2, s2), 22)
+            :spawn()
+
+        evo.remove(e, evo.pair(evo.ANY, s1))
+
+        assert(not evo.has(e, evo.pair(p1, s1)))
+        assert(not evo.has(e, evo.pair(p2, s1)))
+        assert(not evo.has(e, evo.pair(evo.ANY, s1)))
+
+        assert(evo.has(e, evo.pair(p1, s2)))
+        assert(evo.get(e, evo.pair(p1, s2)) == 12)
+        assert(evo.has(e, evo.pair(p2, s2)))
+        assert(evo.get(e, evo.pair(p2, s2)) == 22)
+    end
+
+    do
+        local e = evo.builder()
+            :set(evo.pair(p1, s1), 11)
+            :set(evo.pair(p1, s2), 12)
+            :set(evo.pair(p2, s1), 21)
+            :set(evo.pair(p2, s2), 22)
+            :spawn()
+
+        evo.remove(e, evo.pair(evo.ANY, s2))
+
+        assert(not evo.has(e, evo.pair(p1, s2)))
+        assert(not evo.has(e, evo.pair(p2, s2)))
+        assert(not evo.has(e, evo.pair(evo.ANY, s2)))
+
+        assert(evo.has(e, evo.pair(p1, s1)))
+        assert(evo.get(e, evo.pair(p1, s1)) == 11)
+        assert(evo.has(e, evo.pair(p2, s1)))
+        assert(evo.get(e, evo.pair(p2, s1)) == 21)
+    end
+
+    do
+        local e = evo.builder()
+            :set(evo.pair(p1, s1), 11)
+            :set(evo.pair(p1, s2), 12)
+            :set(evo.pair(p2, s1), 21)
+            :set(evo.pair(p2, s2), 22)
+            :set(p1, s1)
+            :set(p2, s2)
+            :spawn()
+
+        evo.remove(e, evo.pair(evo.ANY, evo.ANY))
+
+        assert(not evo.has(e, evo.pair(p1, s1)))
+        assert(not evo.has(e, evo.pair(p1, s2)))
+        assert(not evo.has(e, evo.pair(p2, s1)))
+        assert(not evo.has(e, evo.pair(p2, s2)))
+
+        assert(evo.has(e, p1) and evo.get(e, p1) == s1)
+        assert(evo.has(e, p2) and evo.get(e, p2) == s2)
+    end
+end
+
+do
+    local p1, s1, p2, s2 = evo.id(4)
+
+    local e = evo.builder()
+        :set(evo.pair(p1, s1), 42)
+        :spawn()
+
+    evo.remove(e, evo.pair(p2, evo.ANY))
+    evo.remove(e, evo.pair(evo.ANY, s2))
+
+    assert(evo.has(e, evo.pair(p1, s1)))
+    assert(evo.get(e, evo.pair(p1, s1)) == 42)
+
+    evo.remove(e, evo.pair(p1, s1))
+
+    assert(not evo.has(e, evo.pair(p1, s1)))
+    assert(evo.get(e, evo.pair(p1, s1)) == nil)
+end
+
+do
+    local f1, f2, f3, p1, s1, p2, s2 = evo.id(7)
+    evo.set(f1, evo.REQUIRES, { f2 })
+    evo.set(f2, evo.DEFAULT, 84)
+    evo.set(f2, evo.REQUIRES, { evo.pair(p2, s2) })
+    evo.set(p1, evo.REQUIRES, { f3 })
+    evo.set(s1, evo.REQUIRES, { f3 })
+    evo.set(p2, evo.REQUIRES, { f3 })
+    evo.set(s2, evo.REQUIRES, { f3 })
+
+    local e = evo.builder()
+        :set(f1, 21)
+        :set(evo.pair(p1, s1), 42)
+        :spawn()
+
+    assert(evo.has(e, evo.pair(p1, s1)))
+    assert(evo.get(e, evo.pair(p1, s1)) == 42)
+
+    assert(evo.has(e, evo.pair(p2, s2)))
+    assert(evo.get(e, evo.pair(p2, s2)) == true)
+
+    assert(evo.has(e, f1))
+    assert(evo.get(e, f1) == 21)
+
+    assert(evo.has(e, f2))
+    assert(evo.get(e, f2) == 84)
+
+    assert(not evo.has(e, f3))
+    assert(evo.get(e, f3) == nil)
+end
+
+do
+    local p1, p2, s1, s2 = evo.id(4)
+
+    do
+        local e1 = evo.builder()
+            :set(evo.pair(p1, s1))
+            :set(evo.pair(p1, s2))
+            :spawn()
+
+        local e2 = evo.clone(e1)
+
+        evo.remove(e1, evo.pair(p1, evo.ANY))
+        evo.remove(e2, evo.pair(p1, evo.ANY))
+        assert(evo.empty_all(e1, e2))
+    end
+
+    do
+        local e1 = evo.builder()
+            :set(evo.pair(p1, s1))
+            :set(evo.pair(p2, s1))
+            :spawn()
+
+        local e2 = evo.clone(e1)
+
+        evo.remove(e1, evo.pair(evo.ANY, s1))
+        evo.remove(e2, evo.pair(evo.ANY, s1))
+        assert(evo.empty_all(e1, e2))
+    end
+
+    do
+        local e1 = evo.builder()
+            :set(evo.pair(p1, s1))
+            :set(evo.pair(p1, s2))
+            :set(evo.pair(p2, s1))
+            :set(evo.pair(p2, s2))
+            :spawn()
+
+        local e2 = evo.clone(e1)
+
+        evo.remove(e1, evo.pair(evo.ANY, evo.ANY))
+        evo.remove(e2, evo.pair(evo.ANY, evo.ANY))
+        assert(evo.empty_all(e1, e2))
+    end
+end
+
+do
+    local f, p1, p2, s1, s2 = evo.id(5)
+
+    do
+        local e1 = evo.builder()
+            :set(f, 42)
+            :set(evo.pair(p1, s1))
+            :set(evo.pair(p1, s2))
+            :spawn()
+
+        local e2 = evo.clone(e1)
+
+        evo.remove(e1, evo.pair(p1, evo.ANY))
+        evo.remove(e2, evo.pair(p1, evo.ANY))
+
+        assert(evo.has(e1, f) and evo.has(e2, f))
+        assert(not evo.has(e1, evo.pair(evo.ANY, evo.ANY)))
+    end
+
+    do
+        local e1 = evo.builder()
+            :set(f, 42)
+            :set(evo.pair(p1, s1))
+            :set(evo.pair(p2, s1))
+            :spawn()
+
+        local e2 = evo.clone(e1)
+
+        evo.remove(e1, evo.pair(evo.ANY, s1))
+        evo.remove(e2, evo.pair(evo.ANY, s1))
+
+        assert(evo.has(e1, f) and evo.has(e2, f))
+        assert(not evo.has(e1, evo.pair(evo.ANY, evo.ANY)))
+    end
+
+    do
+        local e1 = evo.builder()
+            :set(f, 42)
+            :set(evo.pair(p1, s1))
+            :set(evo.pair(p1, s2))
+            :set(evo.pair(p2, s1))
+            :set(evo.pair(p2, s2))
+            :spawn()
+
+        local e2 = evo.clone(e1)
+
+        evo.remove(e1, evo.pair(evo.ANY, evo.ANY))
+        evo.remove(e2, evo.pair(evo.ANY, evo.ANY))
+
+        assert(evo.has(e1, f) and evo.has(e2, f))
+        assert(not evo.has(e1, evo.pair(evo.ANY, evo.ANY)))
+    end
+end
+
+-- TODO:
+-- How should required fragments work with pairs?
+-- How can we set defaults for paired fragments?
+-- Prevent setting wildcard pairs to entities!
+-- Should paired fragments be greater than common fragments?
diff --git a/evolved.lua b/evolved.lua
index 0eb07d1..be71c61 100644
--- a/evolved.lua
+++ b/evolved.lua
@@ -1385,10 +1385,6 @@ local function __chunk_without_fragment(chunk, fragment)
         return nil
     end
 
-    if not chunk.__fragment_set[fragment] then
-        return chunk
-    end
-
     if fragment == chunk.__fragment then
         return chunk.__parent
     end
@@ -1398,6 +1394,111 @@ local function __chunk_without_fragment(chunk, fragment)
         if without_fragment_edge then return without_fragment_edge end
     end
 
+    if fragment < 0 and chunk.__has_pairs then
+        local primary_index = (0 - fragment) % 0x100000
+        local secondary_index = (0 - fragment - primary_index) / 0x100000
+
+        local primary = __freelist_ids[primary_index] --[[@as evolved.id]]
+        local secondary = __freelist_ids[secondary_index] --[[@as evolved.id]]
+
+        if primary == __ANY and secondary == __ANY then
+            local sib_chunk = chunk.__parent
+
+            while sib_chunk and sib_chunk.__has_pairs do
+                sib_chunk = sib_chunk.__parent
+            end
+
+            local ini_fragment_list = chunk.__fragment_list
+            local ini_fragment_count = chunk.__fragment_count
+
+            for ini_fragment_index = 1, ini_fragment_count do
+                local ini_fragment = ini_fragment_list[ini_fragment_index]
+                if ini_fragment > 0 then
+                    sib_chunk = __chunk_with_fragment(sib_chunk, ini_fragment)
+                end
+            end
+
+            if sib_chunk then
+                chunk.__without_fragment_edges[fragment] = sib_chunk
+                sib_chunk.__with_fragment_edges[fragment] = chunk
+            end
+
+            return sib_chunk
+        elseif primary == __ANY then
+            local sec_pairs = chunk.__secondary_pairs[secondary]
+
+            if not sec_pairs then
+                return chunk
+            end
+
+            local sib_chunk = chunk.__parent
+
+            while sib_chunk and sib_chunk.__has_pairs and sib_chunk.__secondary_pairs[secondary] do
+                sib_chunk = sib_chunk.__parent
+            end
+
+            local ini_fragment_list = chunk.__fragment_list
+            local ini_fragment_count = chunk.__fragment_count
+
+            for ini_fragment_index = 1, ini_fragment_count do
+                local ini_fragment = ini_fragment_list[ini_fragment_index]
+                if ini_fragment > 0 then
+                    sib_chunk = __chunk_with_fragment(sib_chunk, ini_fragment)
+                else
+                    local _, ini_secondary = __evolved_unpair(ini_fragment)
+                    if secondary ~= ini_secondary then
+                        sib_chunk = __chunk_with_fragment(sib_chunk, ini_fragment)
+                    end
+                end
+            end
+
+            if sib_chunk then
+                chunk.__without_fragment_edges[fragment] = sib_chunk
+                sib_chunk.__with_fragment_edges[fragment] = chunk
+            end
+
+            return sib_chunk
+        elseif secondary == __ANY then
+            local pri_pairs = chunk.__primary_pairs[primary]
+
+            if not pri_pairs then
+                return chunk
+            end
+
+            local sib_chunk = chunk.__parent
+
+            while sib_chunk and sib_chunk.__has_pairs and sib_chunk.__primary_pairs[primary] do
+                sib_chunk = sib_chunk.__parent
+            end
+
+            local ini_fragment_list = chunk.__fragment_list
+            local ini_fragment_count = chunk.__fragment_count
+
+            for ini_fragment_index = 1, ini_fragment_count do
+                local ini_fragment = ini_fragment_list[ini_fragment_index]
+                if ini_fragment > 0 then
+                    sib_chunk = __chunk_with_fragment(sib_chunk, ini_fragment)
+                else
+                    local ini_primary, _ = __evolved_unpair(ini_fragment)
+                    if primary ~= ini_primary then
+                        sib_chunk = __chunk_with_fragment(sib_chunk, ini_fragment)
+                    end
+                end
+            end
+
+            if sib_chunk then
+                chunk.__without_fragment_edges[fragment] = sib_chunk
+                sib_chunk.__with_fragment_edges[fragment] = chunk
+            end
+
+            return sib_chunk
+        end
+    end
+
+    if not chunk.__fragment_set[fragment] then
+        return chunk
+    end
+
     if fragment < chunk.__fragment then
         local sibling_chunk = __chunk_with_fragment(
             __chunk_without_fragment(chunk.__parent, fragment),