[MNGS-078] The gal older sister, who is so kind to my shut-in younger brother (me) who was abandoned by his family, comes right away when called, spoils me, and becomes my personal flesh onahole, giving me raw sex over and over again.

It's okay, it's okay. If anything bad happens, you can turn your big sister into a masturbator—" Gal Mocha, who returned to her hometown from university, had a struggle. That is, her beloved younger brother Kazuma has become a shut-in. Moka, who has spoiled Kazuma since long ago, becomes the 'woman reserved for her younger brother' who rushes to meet his anxieties and desires whenever called. Moka embraces her every day, fully affirming her like a saint, and gently accepts even her desires. Eventually, their abnormal love gradually turns into a twisted relationship...