A high school girl, Rai, secretly has a crush on her childhood friend, Do-gyeong. To hide her feelings, she pretends to be an idol fan. Just when she couldn't give up on either her one-sided love or her fangirling—her favorite idol transfers to her school?! With Neulchan’s transfer, the relationship that seemed unchangeable begins to shake. "We're just friends, so why are you jealous?" A summer-lit school romance about a childhood friend turning into a girlfriend!