from what i understand, the dad genuinely apologized for the actions of his son and doesn't care that gamin hit his kid but gamin and co did mess with one of his underlings so this is just business (nothing personel kid).
I feel like an upstart editor or maybe the author (who seems new as well) decided this edgy revenge story really needed a female lead (who is also the comedic relief because edgy revenge stories need that as well) and now we're here. The first chapter was good and I guessed I just expected more...
I feel as though this series would have been a lot better if the MC just used victims of these bullies in his plans for revenge instead of having some forced female lead be at the center of so far every revenge. For examaple, the MC could've scoped the place out, met the Hana girl who wanted out...
The female leads role in this story was sealed when the author introduced her as some who is "kind and righteous". Therefore, she is naive and passive. She will somehow always wind up in these situations and will be the author's goto to create problems for the MC. She will have learned nothing...
Why is this dude so unfazed by the fact that a classmate wants to kill him? Also, I'm pretty sure that last panel line is about MC being shocked that H is in that specific hospital not that he finnaly realizes who H is (he already figured out who H was in the previous chapter).