Hi! I have two requests this time :

For my first request, there must be:

- there is romance between a guy and a girl
- the main character is female
- the main character's romantic interest is a murderer, a robber, etc.
- she likes the guy before she knows about his mental problems; it doesn't matter about after
- it's okay if the guy becomes a criminal after meeting the girl for some reason, but the guy must not be mentally sound
- there is no comedy

For my second request (it's similar to the one above),

- the guy isn't a criminal, but the guy does have psychological problems
- the guy is creepy and scary
- there doesn't have to be romance
- the main character is female
- there is no comedy

Thanks!

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[m] Watashi no... Megane-kun[/m]
The guy is very, very, extremely, really scary, sick and mental.
I hope you find what you are looking for!

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Keep Calm and Soy Un Dorito ~ Lee Taemin

Metronome (LEE Won-Jin) the guy's a yandere who's crazy for the girl

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Mars, i believe it fits very well

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"In a world where most people would be crazy, then it would be normal to be crazy and crazy to be normal... but then again, if you were normal, then you would be crazy... isn't it crazy what a paradox a little craziness can create?"

Mars is so good, you have to read it!

I think Junai Tokkou Taichou! also fits your description. Oh, wait, there's comedy! Sorry! But read it anyways, it's really good too

OP don't keep a list, I afraid my suggestion of Lying Mii-kun and Broken Ma-chan is already read.

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grammar mistake is intentional, grammar nazis need their entertainment.