Wenrou encounters an older man on a chat application. After the college entrance exam, their relationship quickly develops. Wenrou’s intention is to ‘If she can’t have him, she’ll sleep with him, and then they’ll break up’. However, she unexpectedly becomes emotionally invested. Gu Quan has never thought about being with a younger girl before, but he is attracted to Wenrou inside and out. He doesn’t want to let go, but before he can make a move, Wenrou takes the initiative. Gu Quan reluctantly agrees, but what will they do if they want to spend their entire lives together…