 If you liked
Tada-kun wa Koi wo Shinai
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 ...then you might like
Doukyonin wa Hiza, Tokidoki, Atama no Ue.
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They are similar when we talk about the theme.
Both MC is an Orphan get false promises from their parents because they are dead. It leave impacts on him,and then someone changed his life. Well in Dokyonin, instead of person,it's a cat that change our MC.
If you are into romance, watch Tada-kun. But if you just want some anime to relax, Dokyonin is the choice.
Oh,and both of them also have one Childhood friend who knows what's the best for our MC. Sometimes when you see them interact,it' kinda look like BLš