Box Irimusume Kawana Ai

A sudden tragedy befalls Ai, who was raised with love from her parents and was cherished! She was sold off as a debt-based mansion, and what awaited her in the mansion in which her new master lives was a box-shaped restraint device that she had never seen before!! She was unable to move in the box, and continues to be persistently perverted in her exposed lower body, but gradually she becomes engrossed in the mansion's owner and entrusts herself with her own body.