Kiyoku Fushidara na Bokura

Overview

A frustrated office lady in her 30s is constantly pursued by a devilish younger colleague...? Ako Otsuki has been missing out on opportunities and is frustrated that she is still a virgin at 29. On her 30th birthday, a man she had a crush on invites her out, and as soon as she loses her virginity, he uses her and dumps her, sending her into a tailspin... "I'm never having sex again." So Ako decided. But then, her junior at work, Nitta, confesses his feelings to her, saying, "Let's go out on that condition," and even though she can't quite believe it, he keeps coming after her...!? Ako's awkward and sweet office romance, which barely involves sex, begins!! (Source: Shogakukan, translated)

Source: AniList