栞 & 平井シンジ Costar Works

栞 and 平井シンジ are an established costar duo, teaming up across 3 works from their initial collaboration '中出し露天温泉 下品にイキまくるチ○ポ大好きスレンダーお姉さん' (2022) to '弟の嫁さん 細腰美尻スレンダーな親族女体に無職の義兄は堪えきれず 今井栞菜' (2026). Their collaborations are predominantly released under the 熟女大学/熟女卍 label, demonstrating exceptional on-screen chemistry in genres such as スレンダー・中出し・温泉.