Lin Yingtao, who grew up in the Mount Qun worksite, encounters Jiang Qiaoxi, the transfer student. Jiang Qiaoxi is a loner. He's transferred to Mount Qun Primary School due to his father's job transfer. Jiang Qiaoxi encounters Yingtao at the principal's office by accident, where she's trying to steal a book. Yingtao misunderstands the encounter and thinks that he's the Grim Reaper. She tries to resolve the crisis by bribing him with candies and requesting her classmates to welcome Jiang Qiaoxi with open arms.

Lin Yingtao's beloved rabbit dies. She wants to tell Jiang Qiaoxi, who loves the rabbit as much as she does, about it. She finally decides to gather the letters she has written over the years into a notebook and send the notebook to him.