Unbeknownst to her, Risei had reached her limit of sexual frustration after her husband ended up in the hospital unexpectedly. When his friend Tetsuro offered to help out around the house while he recovered, she couldn't help but be captivated by his manly, sturdy physique. As she saw him off, she found herself lost in lustful daydreams about him. But when he returned earlier than expected...

不慮の事故で夫が入院してからというもの、欲求不満が限界に達していた瑞希。そこに夫の親友・哲郎が夫の代わりに力仕事を手伝いに来てくれた。男らしい逞しい身体にうっとり見惚れた瑞希は、哲郎を見送るとすぐに淫らな妄想へと耽っていく。相手は夫の親友。こんなこといけないのに指が止まらずイキかけたそのとき…帰ったはずの哲郎が戻ってきていて…。