Netorare kyonyû jukujo: Modorenai kaikan

寝取られ巨乳熟女　戻れない快感 (original title)

Synopsis

Junichi is a web novelist and married to Rei. Junichi is struggling to come up with new ideas, so Rei suggests he try incorporating the opinions of his fans. They hold an offline meet-up, but Junichi ends up having an affair with one of his fans on a whim.