It's about a salesman who moves close to his best friend he has an unrequited love for since highschool. The best friend tells him he had sex with a kouhai at work out of pity and since then, he's been pursuing him.
http://www.mangago.me/read-manga/koyoi_omae_to/ ?
That's the one, thx (づ￣ ³￣)づ
It's about a salesman who moves close to his best friend he has an unrequited love for since highschool. The best friend tells him he had sex with a kouhai at work out of pity and since then, he's been pursuing him.