This is the start of a small serie of doujinshi by the artist Satou Yachil about knowing Rio's anal experience, going with the second release; Rio has gone pretty addicted to the feeling of getting her ass fucked, so much so that she used a masturbator, but couldn't stop it due to the control being unreachable, so she sends an alarm to Sensei, and you can tell the rest.

Support the artist!

https://www.dlsite.com/maniax/work/=/product_id/RJ01449904.html