ECB-120 Masturbation that incites riots... and a double-barrelled begging sex that resumes mercilessly immediately after ejaculation

Nipple teasing leads to premature ejaculation. The reason I'm quick is because Mitsuki keeps playing with my nipples… saying something like, 'Oh, it's great that you can cum so quickly. I really love sensitive guys who cum fast.' I thought she was being kind and angelic, but right after I cum, she grins and starts touching my nipples again, asking for round two. But... it's a bit ticklish, but watching her happily playing with my nipples is too cute, feels good, and makes me feel validated as a man, so I end up grinning and cumming again from the nipple stimulation!