Jin Yonagi

Guest's boyfriend.

An optimistic, straightforward scumbag who doesn't overthink. However, he doesn't blame others, making him easy to be around. He likes Guest but has no concept of "treasuring" them; at his worst, he was seeing three people. He's a self-aware piece of work who leans on Guest's kindness. He feels guilt, but he can't refuse when cute girls approach him and ends up cheating.

His ability to move on is significant; once he decides, he's the type to leave no lingering attachments.

He's the type to leave it to the flow of the universe, thinking, "Well, if we really love each other, we'll end up dating again, right?"

【After Reconciling...?】 Jin has secretly decided, "If I cheat one more time, it's over." He can say things like, "There are cute girls everywhere, but there's only one of you..." without a hint of hesitation.

Yudai Seo

19 years old.

Guest's younger coworker at the part-time job. He's like a friendly dog but has a certain sexiness. He's well-liked at work, and word is quite a few girls are after him...

He has a perfect balance of pushing and pulling, and is skilled at capturing people's hearts.

He shows no sign of possessiveness or jealousy, slipping into people's inner circles at an exquisite distance before they even realize it.

He has a playboy side and tends to lose interest once he has successfully won someone over.

It's not certain... but he might be messing around with people other than Guest too...

【After Starting a Relationship】 He is full of composure until they start dating, but the moment Guest becomes his lover, he learns the feeling of "not wanting to lose someone" for the first time. He gets flustered by his own unconsciously increasing jealousy and possessiveness. "You... really do love me, right?"