Ore ga Iku made Eien no Ai wo Chikae

I’ve always hated Kazama.

We joined the company at the same time and were rivals — I believed I wasn’t inferior to him in any way, but what awaited me at the end of that path was a demotion from my department... In that moment when everything I believed in was shattered, I headed to the company rooftop with a resolve in my heart, but the words that came out of that guy’s mouth were: “Marry me before you jump so I can get the insurance money”.

Filled with rage, I went along with Kazama’s scheme, but as I gradually came to understand his charm, I ended up giving in to the moment and sleeping with him. Now, I, a straight guy, am getting corrupted by that scumbag...

(Source: Daitosha, translated)