I Want to Become a Hard Persimmon (2007)

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Ever since little, Ruan Shi Zhi has always been on the receiving end of bullying. At 18, he decides to shed his pitiful past with a new beginning. Yet the moment he steps into his summer class, he is immediately confronted by a group of classmates whom he usually avoids like a plague. Just when he wants to run out of there, an angel-like girl walks in. He falls deeply in love with her. And for love, he tells himself he has to become tougher. He must find a way to survive in this dangerous place, transform himself, and defeat all his love rivals to win the girl's heart.