 If you liked
Akutai wa Toiki to Mazariau
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 ...then you might like
Yasaotoko to Sadistic
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I'm making this rec bc unlike in many manga we get to read, the relationship between the MC and his stalker hasn't been romanticized. The MC realizes his stalker is deranged, behaves exactly like a normal person would, but due to the persistence of his stalker, eventually ends up giving in to his charming ways.