Looking for an Omegaverse Manga

I don’t remember if it's Shounen Ai but it didn’t have any explicit s*x scene. The ML is an Alpha and owner or something of a Research Centre and MC was an Omega Researcher at his company. MC is the illegitimate son of another Company Owner, who had him with an Omega man (MC's mom) who ran away with a goon after leaving MC with his grandparents as MC's dad married someone from his own social circle. MC had an omega half-brother who was his father's legitimate son and had been betrothed or supposed to be married off to ML. For some reason it broke off and MC's half-brother started dating ML's cousin brother (another famous Alpha). This side couple was both celebrities. ML proposed a contractual relationship to MC for pheromone control or something but they kept it secret at their workplace. MC's dad invites over "fiances" of his both sons (ML and his cousin brother) and the four of them had a dinner with the dad. The cousin kept flirting with MC while the half-brother kept showing off his relationship to ML. ML was annoyed the whole time and MC kept thinking ML didn’t get over his half-brother. Meanwhile MC's grandmother became weaker and suddenly his Omega Dad calls the grandmother saying how she missed them and that he broke up with his boyfriend after he lost all the money MC's mom stole from his grandparents (his parents) before leaving behind MC with them blah blah blah. MC sees right through and says "he only calls now that he has lost everything".
I read till the chapter where MC suddenly went into heat during a presentation and hid in the bathroom. ML had to go and bring him out, carrying him to the car as ML's cousin brother watch them from the hallway.