MNGS-078 — My older sister, a gal who's too kind to me, a shut-in younger brother abandoned by his family, comes over whenever I call, spoils me, and becomes my personal fleshlight, having unprotected sex with me over and over again.

"It's okay, it's okay. If something bad happens, you can use your big sister as your sex toy." Mocha, a gal who had returned to her hometown from university, had a problem. Her beloved younger brother, Kazuma, had become a recluse. Mocha, who had always spoiled Kazuma, tried to accept his anxieties and desires, becoming his "personal woman," rushing to his side whenever he called. She hugged him every day, accepting him completely like a saint, and even gently accepting his desires. Gradually, their abnormal love began to transform into a twisted relationship...