- Flash back from present to 2005, when the most important thing in Xiao Xi’s life was Jiang Chen.
- At school she tells him she likes him. He says he doesn’t like her.
- The teacher yells at Xiao Xi for writing her paper on the wrong topic.
- At home she searches how to win a guy’s heart. She prepares Jiang Chen breakfast the next few days but he avoids her.
- She helps Lu Yang send out letters in exchange for help in writing her love letter.
- Xiao Xi recites the love letter to Jiang Chen on the way home, he tells her to focus on school.
- She writes another letter and recites it outloud. Another classmate overhears.
- Xiao Xi fails the dictation work. Bo Song arrives. He’s a swimmer. He sits behind Xiao Xi and calls her big brother.
- Xiao Xi drops a letter in Jiang Chen’s backpack. He reads it but it’s not her letter.
- Xiao Xi and Lu Yang get in a fight outside with other classmates. Bo Song and Jing Xiao saves them.
- They hand over the letters to the teacher. Xiao Xi’s letter to Jiang Chen is in the pile. The group stops the teacher from reading Xiao Xi’s letter outloud.
- They get punished and have to write apology letters during their detention.
- The guys head to a gaming cafe.
- Xiao Xi chats with Jing Xiao about Jiang Chen.
- The next morning Jiang Chen is waiting for her to head to school together.