Mitsuryo-zuma: oku no uzuki

A public restroom at a train station, a huge phallic graffiti carved wildly on the wall. Beside it is inscribed "Miraiken no Shin-chan". Tomi (Maiko Kazama), a married woman, masturbates while tracing it with her finger. Covered in oozing sweat and love juice, she felt the presence of "Shin-chan.