NGL I kinda love it...

As of now, tbh I kinda love the way both parties are handling it. Like yes, he has been acting like someone already in a relationship. But he's also not demanding for it now that Kyuho has laid out his cards. This is a fair and reasonable reaction to someone that needs boundaries. The ML is kinda unique amongst standoff-ish ml's in webtoons. He prioritizes maintaining the relationships he cares about and that's why he doesn't want labels. I think the formality to him means that if the relationship sours, it'll end things much worse than if they just stayed friends.