I'm a giant sucker for Supernatural Time-Travel stories. I read a BL version of this one with a super similar disheartening plot filled with deaths as well! They both had a happy ending so I'm really in love with this trope!
Incest aside, not the worst. I can make exceptions, especially since it was stated to be incest. This just hits too close to home when it comes to the "eldest gotta be the best" and I hate it aaaaa fuck it I'm becoming biased because this cuts me
The art of this carries damn, improving to draw for this