I feel as though I'm going insane, I swear to God I read this exact series with the exact same plot point but within the 3rd or 4th chapter she locks him in with her in the break room and tries "desensitization training" to her face and he almost gets an erection but goes soft again, and I remember clearly because that's about where I dropped the manga the first time. There's no way there are two almost identical manga with almost identical looking characters, right? So what happened to that arc?