The entire joke is that she picked the one reformed delinquent in the school, and now she's trapped in the worst possible situation: actually liking him while he's still barely holding it together. Every time he promises he's changed, something explodes, and she has to decide between protecting his secret or protecting her sanity. He's genuinely trying. She's genuinely terrified. That's the whole thing.
Momose dreams of an ordinary high school existence, free from the chaos of delinquents and troublemakers. Her perfect plan crumbles when she befriends Ichikura, a soft-spoken guy with glasses who seems refreshingly normal. Then she discovers his secret: he was a legitimate street fighter in junior high, notorious for his brutal reputation. Now he claims he's reformed, yet somehow he keeps finding himself in the middle of conflicts despite his best efforts to stay clean. Momose becomes his unlikely confidante, caught between believing his redemption story and wondering if a delinquent's instincts can actually change. Their strange dynamic pulls her deeper into a world she desperately wanted to avoid, forcing her to question whether people can truly escape their past or if some parts of them remain forever. The tension builds as Momose navigates protecting his secret while figuring out if the peaceful life she wanted is even possible anymore. What starts as a simple promise to keep quiet becomes something far more complicated as feelings develop beneath the surface of their unusual friendship.