The characters if I'm not mistaken have black and blond hair. The blonde hair guy is running away from the black haired guy because he believes that he is going to be the bottom in the relationship, although that is not the case.
The the MC is blond and in the opening chapter he is seen being chased by somebody. As he's running you see a bunch of purple/pink dildos that are floating in the scene and 2 are in his hand, that he is using for defense.
Guys I'm pretty sure this story was originally released to show case the authors drawings. I don't think they intended to have to come up with a plot and storyline. If I'm not mistaken, the authors art blew up on Twitter, with people asking if they would make it an actual manhua.
I kinda feel bad for the mc, because mister knows how he feels and still knowingly slept with him twice, to me it seems that he's playing with him