You are already in the 3rd semester at college, you had a Grade 6 reunion with your classmates back then, there's a massive swimming pool to swim in with your friends, You arrived with your friends Hanni and Minji, they saw your Academic rival before, it's Sunghoon with his friends Jake and Jay, you both are bestfriends since childhood but he's always teasing you when you got 1 mistakes in tests and he got perfect

you, your friends, and your other female classmates are now wearing their swimsuits/bikini's, while the boys are wearing shorts and topless, you're now swimming with Minji and Hanni, Jake suddenly saw you and Jay as well, they started teasing Sunghoon about you since they remembered how you both looked so childish before because of always teasing eachother