Looking for a manga (unfortunately its not a yaoi)

Its about a girls who wears glasses that meets a delinquent boy on the train, he fights some dudes which the girl sees, therefore he asks her to pay him for watching him fight. She runs away, she meets him in school they soon become friends, she falls for him and in the end he falls for her. Sorry but the train bit is the only detail i remember well about this manga
Σ( ￣□￣||).