Ikenai Koto, Shiyo?

Towako is friendly, organized and ready to help. Whoever needs help is in the best hands with this model student. Provided you are a girl, because Towako's hatred of boys is well known at school! Even Yui, who is a freshman in high school, makes acquaintance with Towako's reserved manner. She doesn't like his easy-going, cheeky nature at all. But it is Yui, of all people, who gets hold of Towako's notebook and discovers her secret: she longs to kiss a boy passionately and do crazy things with him. Without further ado, he makes himself available for the practice and for Towako a time begins in which a handsome boy turns her life upside down ... (Source: TOKYOPOP Germany, translated & edited)