On a cold, snowy winter day, a kind young man (Onii-chan) encounters the Mizuki twins, Shiori and Saori, locked out of their home. He lets them stay at his place until their mother returns, sparking a close, almost familial bond. As time passes, the twins grow deeply attached to him — and their innocent admiration slowly blossoms into sexual curiosity.

With their mother working during the day and the sisters rarely home together (Shiori at cooking lessons, Saori at basketball club), one twin is often alone. Their mother asks Onii-chan to keep them company during house-sitting days. What begins as simple babysitting turns into intimate, passionate encounters filled with teasing, exploration, and raw desire.

Episode 1 focuses on the quiet, gentle Shiori, who serves him somen noodles and opens up in the most tempting ways. Episode 2 shifts to the more active and bold Saori, whose study session with Onii-chan heats up fast.

This two-episode OVA from Mary Jane is a nostalgic treat for fans of the original visual novel, delivering cute loli twins, slow-burn seduction, and explicit house-sitting fun in high quality. Perfect for lovers of sweet, taboo, and intimate hentai.

Based on the erotic game by Zero.