ADN505 — I've Been Sleeping with My Girlfriend's Older Sister for Six Months—and We Creampie Every Time We Meet

Looking back, he may have wanted Mayu from the first moment his girlfriend Akane introduced her older adult sister. When he learns today is Mayu's birthday, he cannot sit still and finds himself standing outside her home. He plans to leave if no one answers the doorbell, but Mayu appears. The instant he sees her, uncertainty becomes conviction: he truly loves his girlfriend's sister.