Spoiler please

Spoiler: Aeroc, the absolute idiot, falls in love with Kloff AGAIN in this timeline although it's bittersweet.

Its kloff from the first timeline right? So wouldn't he just go back to rapiel and ignore aeroc? Then wouldn't it just be a repetition of the first timeline just with an omniscient kloff? Im confused...

but at the end, kloff realize that aeroc is his mate, so he should treat aeroc better

Kloff actually liked Aeroc in the first timeline but he didn't pursue him because they're not in the same level and also, he dislike Aeroc way of talking like his all mighty and high. Since Kloff haven't been married, his teacher introduced him to Rapiel and Kloff found some resemblance between Aeroc and Rapiel since they're related. So instead of pursuing Aeroc, Kloff pursue Rapiel instead even tho, he somewhat already liked Aeroc. Like a rebound thing.

That's what i remember in the first timeline, so it make sense that Kloff would pursue Aeroc again. Also, he found out that he also loves Aeroc after he DIED. So he will become sweet in this timeline.

To be fair to timeline 3 Aeroc he has no idea what kind of evil he’s messing with

Okay, so I read all of the volumes of the novels and the sides, so here are some spoilers: (We learn this from the side stories), Kloff was deeply traumatized from how he found Raphiel in the first timeline (dead and raped), not because he necessarily cared about Raphiel himself (he did but as a friend), but his anger and rage came from the fact that Arok "killed his child." The third timeline is bittersweet. I don't want to spoil much, but the child Raphiel was carrying may or may not be Wolflake's and not Kloff's which is why Wolflake helped Kloff even though he hated him in the first timeline (Wolflake was and has always been in love with Raphiel).