One day after work, I was about to go home when an unexpected heavy rain started. Turns out my shift had been doubled up on that same day, so my cute little sister-like coworker, Yuzuri, offered to let me stay at her place since she lived nearby. When I finally got back home, drenched in the storm, Yuzuri was changing clothes behind me... As she slipped off her wet top, revealing an unimaginable pair of massive breasts beneath. What's more, she teasingly wrapped her arms around them and invited me over, seducing me with her irresistible charms.

コンビニバイトをしている僕。ある日、仕事を終えて帰ろうとすると豪雨で帰れない…するとシフトが被っていた明るくて低身長の妹みたいな後輩、夕莉ちゃんが家に泊めてくれることに。ズブ濡れで帰宅後、僕の後ろで着替える夕莉ちゃん…その際にチラっと見えてしまった着衣からは想像のつかない巨乳…しかも夕莉ちゃんが腕におっぱいをくっつけて誘惑してきて…。