When Zhu Xingyao was in high school, she could receive an anonymous love letter every Friday, accumulating more than 80 letters in the third year of high school, and received the most beautiful gift in her life on her 17th birthday. She mistakenly thought that these were from the class next door. The male god Lu Ji did it, and wrote him a letter. This relationship just started, and was reported to the Academic Affairs Office. Years later, at class gatherings, various misunderstandings were solved, and all the touching and joyful feelings given to Zhu Xingyao in her teenage years were given to her. The person who is happy is actually the poor boy Jiang Tu who secretly loved her secretly back then, and a long-lost reunion with a purpose begins.