Harry

It's just the first chapter of the manga and we don't know about Kotani's situation at all. I agree that Kotani should not have dismissed the thought overall and I am glad he said sorry and realized his mistake
.
Secondly yes it's weird to say let's have a ceremony but not be married on papers. It's a thing with me also I don't wanna be married on papers cause I have been scared my whole life of marriage and idea of marriage to be tied to someone through papers. If I have a partner I am happy just living with them that's all. Soo I understand a bit with kotani is coming from. Many people don't want marriage just a life partner who you live with.

So in my conclusion currently shishikura makes more sense cause yes he wants to get married and deserves a partner who also wants. Kotani's reasoning are not there and in future we will discover. So let's just not start hating on him just because he has different opinion on marriage.

(Also this is enemies to lovers and many manga make the couples still fight after getting together it's just the trope)

I love how sehun has developed and also yunshin. In the beginning yunshin was naive and didn't understand not everything in this world is gonna work by doing right and is now trying his methods also in a way and understanding the whole situation.
While sehun who had no feelings and only acted with rationality and rigidty is now letting his feelings sweep him off when he realised that yunshin really don't want anything from him and he just likes him because he is who he is. It took time for sehun to develop this until the last chapters he didn't trust yunshin completely and was still unsure about his feelings but now as they are establish my man wants to quit the firm if he jumps I jumps