Is actually very important in both timelines. Basically, it showcased his growth as a character and how tragic/painful/pitiful his path as the heir was. It is assumed, other than the delayed death of their parents, he made the same choices as the old timeline (plus has a better relationship with Hari AND ofc the endgame spoilers). Basically, after the parent's death, Hari and his two brothers are sent to ex fiancee's home (that's where Hari develops a sibling relationship with her fiancee) and he stays/is left behind to do what an heir would do. Study his *ss off to ensure the safety and well-being of his siblings. Barely remember much on the spoilers other than his time as training as the next head of the household was one of the better written parts of the manhua. OGtimeline Eugene as everyone suspects, most likely also fell for Hari, like I said earlier, he makes similar choices in the OGtimeline with better relationship results in the new timeline. At the old timeline, it is as you typed, or at least, it was implied to be the case. He's guilty of his actions against Hari that at the very least, he guarantees a kind hearted and someone well acquainted with their family as her fiancee (aka our blue haired boy).