No. It is webtoon based. There will be happy ending as the webtoon had a happy ending
No. I don’t remember exactly but in webtoon the FL had done something so that she won't remember her past live if she reborn again. So that's a happy ending.
I do not find any bl kind of thing in this drama. I think it is more like a good friend behaviour. They care for each other which all friends do for his/her friend. Please stop romanticizing everything.
Should I start watching?