Yeah like he realised that Sihyun was in a bad mood and also that he was wearing the ring. Usually, people would be able to correlate the two and figure out rather than assuming he probably didn't see anything. I'd understand if Sihyun wasn't angry but he's clearly agitated!?
so fucking tired of mc receiving all the clues that there's something wrong going on but NOT DOING ANYTHING ABOUT IT. there's no way bro