 If you liked
Maniac ni Aishite♥
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 ...then you might like
Violence na Kimi ga Suki
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Both seme originally appear nerdy before undergoing a character transformation that makes them appear "cool". Despite this, neither of them really change on the inside. One is still an otaku and the other is still a wimp, no matter how handsome they may appear. Please note that Maniac ni Aishite is by far smuttier.