Aki Izumi is the prim, proper, and serious student council president who takes pride in his secret boyfriend, Ichii. To the outside world, Ichii is a gentle, smiling prince who showers Izumi with loving care, and Izumi happily immerses himself in the sweet aftertaste of their relationship. However, this seemingly perfect romance takes a dangerous turn when a certain incident occurs. After Izumi tells a small lie, Ichii’s personality shifts, and he subjects Izumi to an unbelievable punishment in the student council office. Izumi finds his arms bound as Ichii uses harsh, scolding words, demanding a proper apology. Caught off guard, Izumi panics not because of the mistreatment, but because he feels a rush of pleasure from being scolded, a sensation far more intense than any sweet moment they have shared. The story explores the resulting immoral love between a hidden sadist with yandere tendencies and an honor student who discovers his own masochistic inclinations, as Izumi finds himself further corrupted by this guilty pleasure. Later arcs show the pair attempting more intimate scenarios, such as a sleepover where Izumi tries to play house by cooking dinner, only to be met with Ichii's barely restrained desires. The setting is primarily their school and Ichii's home, focusing on the private power dynamics hidden beneath their public personas.