kinda a spoiler
but it basically just means it has 3 different lifetimes of the couple.
first timeline/ lifetime is the saddest shit ever.
2nd timeline/ lifetime: uke has memories of his past life (1st timeline) meanwhile seme doesn’t.
3rd timeline/ lifetime: seme has all memories of the 1st life and how badly he treated uke and regrets it. uke doesn’t have memories of any past life.
overall it’s a very sad story

can someone pls explain the concept of this manhwa to me? i heard it has timelines???? what does that mean??????