『えっ?大きくなってない?お姉ちゃんたちに見せて…』ボクの事を子供扱いしてくる少し歳の離れた2人の巨乳姉と旅行先で一緒に温泉に入ったら…
"Huh? Haven't you grown up? Let me show it to you, big sisters..." I went to a hot spring with my two big-breasted sisters, who treat me like a ***, even though they're a little older than me...