wanderer

Actually I forgot its name it was a yaoi Japanese manga it was a n office romance, so the story goes as (the MC was having a bit of difficult time accepting MLs feeling and there's MCs office coworker who was bit promiscuous manipulating him against the ML that he should not accept or love him as LOVE is not worth it , but then he actually falls for the 2nd ML who was MCs friend (kinda rich I guess) who himself was rejected by MC. It was kind of spin off/side story i don't remember very well starring coworker×2nd ML coworker gets character development and start to chase 2nd ML to get on his good side[2nd ML kind of becomes the CEO of their company] and he really dislike the coworker who is now pursuing him but coworker actually really genuinely likes him and want to know him and also changes his appearance dyed hair at that time it was ongoing maybe it have been completed by now his hair if anyone knows please I'll appreciate it, if someone needs more details I can give it about the storyline and setting but I just want to know the name so bad

Looking for this particular plot I have tried on reddit and other platforms but no success, just thought of shooting my shot here
*I'm looking for romance books can be modern or historical where the male lead is in love with someone else and he is just stringing along/ leading on the female lead (female lead may or may not be aware of this doesn't matter) it may or may not have a HEA, there should be some good angst.

P.S (it can be a manga/manhwa too )