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.
It not this one. The Manga was colored but thank you anyways dear
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.
Is this it?
https://www.mangago.me/read-manga/so_who_got_screwed/
It is thank you., sweet angel