My Older Sister Can't Be This Psychotic!

Naruto had always known his older sister, Yumeko, had a problem with gambling, and more than once he'd had to participate in some scheme or debt of hers against his better judgment. However, when she shows up at his bedroom door with a camera after her first day of high school, he has to admit she'd reached a new low. Yumeko x Naruto. Incest.