The older brother said that bc he and Sejin both work in business, so they already know who each other are already. But Sejin reintroduced himself to the older brother, so he thought it was kinda stupid of Sejin to reintroduce himself since they already know each other's name and status in the industry.
Also, this is just a theory of mine and some others, but I think the older brother r@ped Sejin in the bathroom in the past or from a past life. Remember, Sejin had nightmares of someone r@ping him, and I think that was a misdirection for the readers to think it was Kwon (ML) who r@ped him, but it could possibly have been the older brother who did it. The nightmare also showed that the r@pist said smth to Sejin that made him give up and stop fighting back.
So, I think the older brother (Sejin's r@pist) said smth like how Sejin is just Kwon's sex toy and doesn't actually love him, so Sejin was heart broken and gave up fighting back. This also could've led to another theory that Sejin commits suicide by shooting himself with the gun in Kwon's study room since he felt that no one loved him and he had no family AND was r@ped with no one caring about him.
im confused as fuck
did the ml travel back in time or did the mc lose his memories? in chapter 32 where he met ml’s brother ,he(ml’s brother) said “oh, are we pretending like we don't know each other today” and that line got me confused. like if the ml had traveled back in time why would the mc get flashbacks from that time? ig i wont find out what’s the actual truth untill it will get revealed in the manhwa