Shy Satsuki Shinohara's plan for a big high school debut are almost ruined by a pervert on the train, but she's saved by none other than the gangster" student in her class, Yamaguchi-kun. He's already got a bad rap with the other students, and though Satsuki tries to approach him, he seems to always weasel out of her grasp. But she's not one to let a challenge daunt her, and she's out to prove that Yamaguchi-kun is so much more than he's cracked up to be."
“If I do well on Sports Day, let me kiss you.” Sports Day for their first kiss is starting?! Yamaguchi-kun volunteered to run the relay so that he can improve his reputation and be lovey-dovey with Satsuki at school! To root for Yamaguchi-kun, Satsuki wants to join the cheerleaders, and…?!