Mizutani is a self-absorbed overachiever, concerned only with maintaining the highest grades in school. Haru is an impulsive short tempered brute, who scares everyone with his explosive bursts of violence. Haru gets suspended on the first day of school when he encounters some bullies harassing a student and dispatches the bullies with great bloody violence. Mizutani is tasked with delivering school materials to Haru who interprets this as an act of friendship and latches on to Mizutani, much to her dismay. And so begins a strange and potentially combustible relationship!
Valentine's Day, which is coincidentally Shizuku's birthday, fast approaches and the girls decide to cook up some truelove chocolates for the boys of their desire. A fun cooking party gets awkward and tense when Oshimasan and Shizuku confront the fact that they're both making chocolates for Haru! Will Oshima back down as she always does? Given Haru's obsession with Shizuku, will it even matter?