@Lency
Spoiler!
ido (seme) regress and also the uke but the uke doesn't know that he regress also not now to be precise, ido is traumatized when uke shoot himself in front of ido in their past life together...thats why in the present one he literally repenting and taking care of uke like a porcelain doll (he did love the uke), before uke died on previous life they imprint each other and when you imprint someone they are link together so ido finally knows how Uke been treated and even the ra** part of his eldest brother (my he not have a rest of peace his a piece of sh**) so thats why he got engaged to uke and took care of him and didn't really wanted to marry him cause ido wants the uke to be free after the fall out of the family of uke and after he took care of his piece of sh** brother who ra** countless omegas...he died and got exposed by the crime (he also die in the previous life) the death this time is idos's planned on for a long time gathering every evidence. (i wont spoil much now haha)