and also, I think the new guy is not a competition....unless I'm mistaken because of lack of sleep, I read it somewhere that it's Baek-Seoul's(can't fucking remember her name) brother...so yeah?
I also had the same impression from the guy gave away this brother(if not, then male relative) vibe. They resemble one another in a way. But someone did mention that drama should be expected so it could be a interference between both girls.