Abandoned by his family, I'm a shut-in younger brother with an overly gentle yet sexy older sister. She'll come running to pamper me at the slightest call, and she's even willing to become my personal sex toy, having unprotected sex with me countless times. (Spring Sunshine Moe Flower MNGS-078)

"It's okay, it's okay. If you encounter something unpleasant, just use your older sister as a masturbation aid—" Moka, a hot girl visiting her hometown from university, has a problem: her beloved younger brother, Kazuma, has become a shut-in. Having always spoiled Kazuma, Moka, in order to accept his anxieties and desires, gradually becomes his "exclusive woman," rushing to his side whenever he calls. She hugs him every day, affirming him like a saint, even gently accepting all his desires. Soon, their unusual love gradually evolves into a twisted relationship…