IMO-006 - Intense training to cure premature ejaculation using my little sister's mouth and pussy!

Mizushima Alice, now known as Oto Alice. This is from before her 'modifications.' Her intense moaning and constant orgasms are just as they've always been. Hotori Ayatsuji has a dynamic body. The plot involves a premature-ejaculating brother with such high libido that he keeps going again and again... honestly, I'm not sure how I feel about it.