Nahhh... I don't think he needs redemption arc, this kind of situation where he was forgiven quickly after what he did will always make his guilt eat him like if they're sweet or lovey-dovey then he remembers how cruel he was then forgiven just like that cause the uke loves him so much and is so kind. It'd be like not the other semes where they chase to be forgiven and when they're forgiven it can ease their guilt a little bit after what they did, the seme in this manhwa didn't get to chase, he didn't get to see the uke mad for what he did, the uke just forgave him quickly, instead of easing his guilt it would eat him up like "how could I ever do all that to someone kind like him."
Anyways, this is just my opinion in their situation and how quickly he was forgiven, I dunno if that will really happen in the manhwa(I hope it will)
My favorite redemption arc are: BJ Alex and waterside night. There is also kiss me if you can (he especially suffers in the side stories) and beware of the full moon in march (I don’t remember it very well except ml did preatty terrible things at first).
About a chasing arc I’m not really sure they can be considered a proper chasing arc ,but the only ones I can think are: the third ending,2020, the s class sweet as honey, dangerous convenience store.
I have a terrible memory and don’t remember the story very well, but they should be enjoyable reading. I hope it was helpful
i love chasing arcs and i have too much to type so I'll just give u the list i made lol. It also has the chapters of said chasings
https://www.mangago.me/home/mangalist/2979508/?filter=&page=1

I agree with the comments where the FUCK is the redemption or chasing arc. I’m irritated this started off as a good manga but went to shits towards the end can anyone give me good recommendations of chasing/ redemptions arcs please I feel so unsatisfied with this manga