From the Shoujo manga: Wallflower. Also known as Perfect Girl Evolution.
I'm quite taken by this girly manga, probably because the main heroine Sunako is exactly like me when I was 15. One dark anti-social scary girl that loves horror movies. Though I was never stuck in a mansion with 4 sexy boys trying to make me a lady.
Icon is of Kyohei Takano in chains! <3 (I do so love the shoujo boys in chains!)