Hmm, a twist ending.

Yuu can't please his wife Mami anymore, their sex life has been dull for Mami in recent years while Yuu doesn't seem to catch a hint, but Mami tries to be an understanding wife, Yuu is just too tired from work. In her workplace, however, Mami is treated nicely by her junior Ishikawa who invites her to the company's onsen trip, Mami reminisced about the day she went with Yuu last year which prompted Ishikawa to ask if her husbant won't go now, he is too busy Mami says; at any case, Ishikawa hopes to see Mami there at the onsen.

Mami just thinks he is generally nice but Mami's colleague, Hoshino, immediately barges in and says Inshikawa is obviously interested in Mami as a woman, she can tell, Mami should go for it, Ishikawa looks like a catch; Mami is taken aback someone seems interested in her, but she doesn't pay any mind to that any further, for now.

During their workplace socializing at the onsen, however, Ishikawa goes on the offensive once Mami is dead drunk, he really desires her; once Mami wakes up she naturally protests and wants Ishikawa off of her but she is still under the influence and Ishikawa is working his way around Mami's body, she hasn't felt this way in a long time, when Mami sees Ishikawa's dick she grows a little mesmerized, actually wanting to service him as Ishikawa tells her he is serious about Mami, he likes her, but that's when they are interrupted, that way Mami's mind clears a little, she hides the fact Ishikawa was there and uses the opportunity to make him leave quietly.

Once in the onsen bath though, Mami recalls what just happened and the sensation she felt, it was too much, naturally what happened was wrong but she hasn't gotten a good time for years, prompting her to masturbate, her body is desperately longing to be touched; that's another opportunity for Ishikawa to attack, he forces himself and this time around Mami is completely disarmed, fully surrendering herself to this.

At the end we see Hoshino gets a message from Ishikawa who informs her everything went according to plan, she tags him as big dick idiot, thinking little of him and bad mouthing Mami, calling her an easy lay; Hoshino is there with Yuu of all people, asking her what's wrong, nothing Hoshino says, she wants to continue their night with another round of sex now that they finally had time to get together today, Yuu calls Hoshino a dirty sneaky girl.

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What it looked like the usual netorare plot, turns out it was setup to instigate an affair to validate another ongoing affair.

Base +21, nowittycomment +18, Chapell +6