My Dangerous Pet Boy

"For saving me, I'd like to repay you with my body." Mashiro was beaten and left for dead in a gutter, but Yuiko saved him, and now he's moving in!? On top of that, he offers sexual services in return for her kindness. It's her first time, and yet she's so turned on...... All she knows is his name, but her life with him is full of thrills. What will become of Yuiko's exciting romance with her new pet boy?