Its obvious as everyone else said he might be the dude who died with him. But wouldn't it be funny if originally he had crush on the mc in previous world thats why he implies that he knew him well, which also why he appear in such convenient time before he got hit by the car trying to save him, which also implies he could only admired him from afar for some reason.
I think the author has made some pretty clear hints that it’s his coworker. MC couldn’t even remember the face or name of the coworker but it’s clear that the dude was into him. This manga seems like a comedy so I don’t think the author’s cooking some kinda crazy plot twist lol
Its obvious as everyone else said he might be the dude who died with him. But wouldn't it be funny if originally he had crush on the mc in previous world thats why he implies that he knew him well, which also why he appear in such convenient time before he got hit by the car trying to save him, which also implies he could only admired him from afar for some reason.