Namwoo tells sieon that he's in loves him and sieon responded with thank you. He apologizes for not being able to return his feelings and tells namwoo that he understands if namwoo wants to break up bc sieon can't return his feelings. It's not a rejection of dating or anything but sieon isn't in love with namwoo. Also season 1 ended 3 days ago. Look under the replies for this topic because I wrote a more detailed spoiler.
https://www.mangago.me/home/mangatopic/13533414/
also here are the raws if you wanna go in and look for yourself
https://newtoki95.com/webtoon/7435834?toon=BL%2FGL

just saw the spoilers on tik tok, i am not happy