N/A, it has 2 monthly views
異世界ねぇちゃんは、イク時しか魔法を使えない, Isekai Nee-chan wa, Ikuji Shika Mahou wo Tsukaenai
“Why does this feel so good? What magic did you use?!” His childhood friend knows nothing of sex, but that doesn’t stop him making her come over and over again… Allow me to teach you everything while you melt around me!