K & 優生 Costar Works

K and 優生 are an established costar duo, teaming up across 2 works from their initial collaboration 'ドスケベ黒ギャル女子校生快楽中毒デカ尻性欲モンスター' (2023) to 'シロウト観察 モニタリング 逮捕しちゃうぞ！痴女ポリスが素人男子にエッチな取り締まりで強●射精！DVD販売店編 ＆ 10発ヌくまで帰れまてん編 AIKA' (2025). Their collaborations are predominantly released under the 桃太郎映像出版 label, demonstrating exceptional on-screen chemistry in genres such as バック・手コキ・フェラ.