and why was he the only one with whom she stayed until the end （/TДT)/
I think she wanted to try living peacefully away from the system, but because she doesn't age she realized its pointless to do so again, I think it was in the scene after she came back from Gu Chen's world.
Thank you for the answer!! so saaaad!
You're welcome, and it really is sad but I think she also hasn't gotten over that guy that save her from another world.
Ok so what confuses me about the group chat is Our girl stayed with Gu Chen until he passed. Is his ghost the one responding in this group chat?