Letitia

So it's an omegaverse manhwa where the MC omega is the adopted son of a rich family, who are now going through a downfall. The ML is a cruel alpha who is bedridden due to an accident. The alpha's father blackmails the MC to become the temporary omega for his son and produce an heir for his business.

The ML and his father have greyish hair, they have an attendant/bodyguard with red hair. The art is good and all the dialogue-bubbles are in the same colour as the characters' hair.

There are side stories with the ML's father and an omega with long hair.

Plz help me find this story

So it's an isekai BL, with omegaverse. The MC is transported into the universe of a tv series/book, in the body of an omega, who tried to commit suicide. The omega had married the son of a chaebol family and had a baby boy from the marriage, but then his husband died and his mother-in-law treated him very badly. So he decided to commit suicide. In the original timeline, the focus is on the omega's son who grows up to be a typical arrogant alpha who falls for an omega and becomes the ML in the tv series. But since our MC is isekaied in that universe, things deviate from the original timeline. He doesn't commit suicide and is saved by another handsome guy (our ML) who also has a baby (his dead sister's kid or something). This 2nd kid is actually the one who grows up to be the omega MC of the tv series, who is then pursued by the baby alpha I mentioned. Our MC tries hard to maintain the original storyline of making the two kids fall for each other, without him actually having to die, but in the process he falls for the guy who saved him (who was supposed to be his son's father-in-law).

Idk if my description makes sense, but if someone knows this story, plz tell me