Seitokaichou no Shiri Ana Choukyou Nikki

A high school student council president finds herself drawn into a secret world of pleasure and submission. Her daily life as a model student hides a growing curiosity about taboo desires, which she explores with a trusted classmate. Together, they document their intimate experiments in a private diary, each entry pushing the boundaries of their relationship.

As their sessions grow more intense, the student council president discovers a new side of herself, one that craves discipline and reward. Her partner, a dominant figure, guides her through a series of increasingly daring acts, blurring the line between control and surrender. The diary becomes a record of their shared journey into forbidden territory, where pleasure and pain intertwine.