Muttsuri Onaho Aki-chan

Aki-chan is a quiet and reserved high school girl who keeps to herself. She has a secret hobby that she indulges in private, using a special item to satisfy her desires. Her life takes an unexpected turn when her classmate, a popular and outgoing boy, accidentally discovers her secret.

Now that her secret is out, Aki-chan finds herself in an awkward and compromising position. The boy, instead of exposing her, proposes a deal that will change their relationship forever. As they navigate this new dynamic, both must confront their hidden feelings and the boundaries of their arrangement.