SAN-100 The neighbor with big breasts is easygoing.

"Yuri" has a secret that she cannot tell her husband. It is about her meeting an older man, "Kato", who lives in the neighboring apartment. The affair began naively, but ultimately turned into an inseparable relationship. "Yuri", who wants to have children, despite "Kato", who is confused about ejaculating into the vagina, perhaps has a low awareness of purity and closes her eyes with a happy expression.