後輩の長浜を連れ営業へ行った矢先、豪雨により交通機関が麻痺してしまい急遽地方の温泉旅館に泊まることに。そこで目の当たりにしたのは、ただの後輩だと思っていた長浜の、浴衣からはだける、妻にはない大きな乳房、豊満なお尻、若々しく健康的な身体。それに加え愛嬌と背徳感ある関係に俺は完全に屈してしまった…。

Just as I was on a business trip with my junior colleague, Nagahama, a torrential downpour paralyzed transportation, forcing us to stay at a hot spring inn in the countryside. There, I witnessed Nagahama, whom I had only ever seen as a junior colleague, with her large breasts (unlike my wife's), voluptuous buttocks, and youthful, healthy body spilling out from her yukata. On top of that, her charm and the sense of transgression in our relationship completely overwhelmed me…