オトカノ ～おとうとの彼女が文系で強め!?～

It’s a summer night. At home. After six months of dating, I finally cross the line with my humanities-major girlfriend. After going at it multiple times, we fall asleep, wrapped in each other’s warmth. The next morning, I wake up to a strange, ticklish sensation between my legs. Blinking away the sleep, I look down to see someone fondling me with a dazed expression. But it’s not my girlfriend— It’s my always-stern, overly-serious, science-major… older sister! [Translated from [url=https://www.melonbooks.co.jp/detail/detail.php?product_id=1373739&adult_view=1]melonbooks[/url]]