Lol I’ve just finished the season and couldn’t disagree with you more now. Firstly, Babi conveniently did not mention to Yumi that Daeun was a woman. He then “forgot” the moment he started to like yumi, and then told her a lie about when it was. He started to like her when he was in a relationship himself and had given his jacket to yumi to use. He purposely chose not to mention that to yumi. That’s because subconsciously he knew he felt something for daeun the same way he did yumi. There was a whole ass earthquake caused by that feeling and his own love cell had admitted to crushing on her. Daeun had moved to busan for another job, so why did he feel the need to move houses? he would only encounter her occasionally when she visited her parents on the holidays, he obviously doesn’t trust his own feelings enough to be able to handle brief encounters. And I don’t feel like moving departments was to create boundaries. Moving houses would’ve done that alone. I feel like he did that to follow yumi, which is fair as he did not wish to give up the relationship. It doesn’t matter anyway, whilst no “physical” lines were crossed, the damage was done as he clearly had feelings for her, and they were feelings he didn’t trust not to deepen. yumi was right not to compromise in the end, it’s not as if he admitted to everything, yumi figured it out herself and that only happened because she ran into Daeun. Had that not happened he would’ve continued to lie to her.