Small Tits Maid Seeding Press: I Became A Maid To Protect My Sick Sister From My Bullying Foster Dad! Yui Nagase

A wealthy man adopted a pair of sisters with no family. This man was a lecherous pervert hiding behind a mask of kindness. The man who became their adoptive father bullied the older sister at every opportunity. In contrast, the younger sister was doted on with full-blown perversion. To protect her sister, the younger sister decided to serve as a maid. Exploiting her feelings for her sister, the huge adoptive father pinned down the younger sister, Yui! Yui was violated until her frail body seemed about to break, gradually losing her sanity.