Spoiler !!
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About the cheating, 3rd guy kissed(tounged) the mc and thats it. Have a lot of flirty interactions. Also.. the 3rd guy kind of not truly like the mc but he liked the ml. And no they didnt have a sex with other person, the 3rd person cant even imagine more himselfs cuz they both a top. Lol
I think the mc is a virgin, in previous series has stated that he didnt/never had sex with a man before and mc is his firsts.
Ml have a tons of exes.
Mc has never been in a relay but did reject people in the past .So its his first relationship with the ml.
In On or Off, Yiyoung (mc) had never been in an actual relationship but he had slept with some men before meeting Director Kang (ml) cause he talked about never actually getting off from doing it from the back before meeting Kang so that implies that he had sex before but that it wasn’t good sex lol

Can someone tell me or spoil the story for me? Did the ML actually cheat on the MC, or is that being misunderstood? I’ve seen people saying that the ML slept with someone else while he was drunk because he thought that person was the MC. Was he already in a relationship with the MC when that happened, or was it before they got together?
Also, is the MC a virgin? Because from the comments, it sounds like the ML is very experienced, and this is one of my biggest issues with these age-gap stories. They either make the older bottom completely inexperienced when it comes to sex, like they’re literally a virgin despite being older, or when it’s an older top/younger bottom dynamic, the younger bottom is always conveniently a virgin and has never had any previous relationships. So I just wanted to know if the MC is actually a virgin here or if he has had previous experience/relationships.