 If you liked
Love♥Monster
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 ...then you might like
Special A
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The lead guy is head-over-heels crazy in love with the female lead, who is a bit of a tsundere (cause she doesn't take the guy's feelings that seriously and can be mean/hurtful at times). They're also utterly dense and at times, too naive.
The mangas are also similar since the lead characters seem to be separate from everyone else, having their own little world, and EVERYONE looks up to/adores them.
We can also see a whole lot of I'm-using-the-girl-you-love-the-most against the male protagonists.