I don’t know, I personally think both him AND Cirrus are valid. We as readers understand Cirrus enough to know that there’s barely anyone he trusts and Ri-in’s like a sister to him. It’s very clear from Ri-in’s reaction that something seriously horrible happened to Cirrus. I don’t think he was in the emotional state to be thinking about Chan-il at that moment.
Sure. I can understand and empathize on Cirrus end but that's because we're readers, we're basically been reading into his past and current life. However Chan il isn't one of us. I just think it is fair for him to feel anger if we were in his shoes after seeing that scene. Cirrus and Ri in hurted him even tho it wasn't intentionally. Chan il deserves that apology or atleast an explanation especially from Ri-in
If I ever saw my bf hugging a girl (even if she's his childhood friend) in such caring manner after running out on me without explaining a goddamn thing, I would totally be disappointed. Like why can't she just tell Chanil that she is meeting up with Cirrus and she is just there to go comfort him. Chanil and Cirrus are friends to begin with, surely with Chanil's understanding personality can kinda understand what sort of relationship Cirrus and his gf have. But no. Now we have Chanil who after so attentively took care of his gf stuff, suddenly saw his gf hugging his friend who then walk hands in hands into the building together. Authornim really loves creating misunderstanding. Author better come up with a great explanation for this and an apology from Riin and Cirrus. (Like dude bro, seriously, why tf you go calling someone's gf for comfortㅠㅠ)