They're Celebrating Qingming Festival Next to My Grave

Mes, the kind-hearted heir of a rich family, dies mysteriously and becomes a ghost. For twenty years, he waits in the graveyard for someone to visit so that he is able to reincarnate. However, his plan for reincarnation changes completely when he spots Tan, a young boy who is able to see and talk to him during every Ching Ming Festival. A few years pass and Tan, now a university student, grows suspicious about Mes's death. He promises to discover the circumstances of Mes's death and takes Mes to live with him. As they solve the riddle of Med's death, the boys find themselves falling in love with each other despite the certainty that one day they must part.