On the first day of school, Lin Zhi said "He is my boyfriend", making Bingshan senior Jiang Chen her "perfect shield". In order to cover up the lie, she negotiated hard, but unexpectedly encountered his gentleness in feeding stray cats. When Jiang Chen proposed a contract to "pretend to be a couple", a love exercise began where everyone gets what they want. He tutored her to overcome academic difficulties, and she accompanied him to deal with family concerns, but in the protection under the fireworks and the talk in the rainy night, they both crossed the line. From the starting point of lies to the other side of sincerity, this love that started with trading is quietly coming true.
