Sister’s Anal Expansion in Progress! [Bidoro Staff]

Synopsis

An older brother suffering from exam-related stress.

His younger sister, seemingly reluctant yet willing to do anything for her beloved brother, offers her body to support him.

Day after day, she displays herself in erotic ways to serve as material for his solo sessions.

The stress of being unable to penetrate gradually escalates into persistent intimate play.

A daily life begins where foreign objects are inserted into her anus.

Until she develops into a lewd hole capable of accepting and pleasuring her brother…

★Highlights from early story:

Every day, she assists her brother’s masturbation by posing erotically in front of him

★Leading to anal expansion:

With her first anal insertion…

L-Look… Big brother. My butt hole has become this big

●A new sensation: Heartwarming yet perverted incest

Despite its soft aesthetic touch, the content features intense anal expansion and fetish play!

●Enjoy the process of inserting and expanding with various foreign objects

At any point during gameplay, you can check and visually fantasize about the state of her expanding anus