Lemon and Cherry

(from ebookjapan):

"You're like a lemon. Sakura's like a cherry!" On the day when her classmate Sakura's brother Keiichi told her this, Reiko bites into a lemon all by herself. This sourness is a taste of youth - the school life she has just started. A quarrel with a group of delinquents, a heart-to-heart incident, student council elections, semester exams, and a faint, faint feeling for her classmate Mine. However, there is a hidden secret in his past. ......　A timeless masterpiece that describes the troubled life of a high school student!