I read this yaoi manga a while ago, and now I can't seem to find it! It is about an experienced designer (might just have been an office worker, I'm not sure) who is good at his job, and a new employee that he is supposed to work with who is also supposedly going to replace him. So the first guy tries to be cold to him, but as it usually goes in yaoi mangas that doesn't last too long, and they eventually end up together!

Not too much detail, I know, but if anyone can help my I'll really appreciate it!

Oitekebori Blues ch4 / ch6?