Autumn's Concerto.

Ren Guang-xi, a cocky law student, seems to lead the perfect life. He's the sole successor to a huge and famous business and is a talented ice hockey player. But in reality, his lonely life lacks joy, laughter and motivation. That is until he meets Liang Mu-cheng, the new bento seller at his school canteen. A harmless bet brings the two together and Guang-xi slowly changes as Mu-cheng teaches him how to give and love. Tragedy strikes when Guang-xi suddenly has to go through a major brain surgery which causes him to lose his memory.