彼女の姉はギャルでビッチでヤリマンで

My serious girlfriend's older sister is an older girl who gives off a strong gyaru impression. She pulled me into her room and even though I've never even had sex with my girlfriend before, this sex-loving girl took my virginity, squeezing me dry again and again. (Source: Melonbooks, translated) Note: Released at Comiket 96.