sorry guys i slept LMAO anyway, i have two links
- webnovel
https://www.webnovel.com/book/32331132600202805/87019474330379483 (main story)
https://www.webnovel.com/book/32602547800217005/90072274002046326 (side story 1 only)
- and this other one, but beware that there are some typos so u have to use ur brain to understand sometimes
https://blsnacks.wordpress.com/kiss-me-if-you-can/
it has all the side stories
as far as i know, the omega brother's novel is still in the works i think?? that or no english translation. i haven't read the novel of the others so im not sure (since omega brother wasn't introduced that much here) so im sorry, i found a thread that mightt help though! https://www.reddit.com/r/BoysLoveAnime/comments/1loyelg/zigs_omega_verse_web_novels_credits_to_the/

read the entirety of the novel including side stories, and honestly. its so good. thats it. i highly encourage reading it (if youre impatient like me, lol)
i come back to the manwha time to time though cause sometimes my imagination fails to imagine but really, reading the novel will make u say C is the only sane sibling LOL (not that i’ve read the other works.. but if im wrong, feel free to correct) its sad, his trauma too, ugh, too real to feel. made me cry a bit