Bitch no Ore ga Zetsurin no Kouhai (Honmei) to Amaama Ecchi Suru Hanashi

How could he ever forget about his underclassman from university? It's been more than 5 years since he graduated, and office worker Haruto still has feelings for him. To fill the hole in his heart, he spends night after night in the company of a different man. One day, a new employee joins his team at work. Turns out, it's the love of his life, Souma. He is overjoyed to be reunited with Souma, but when Souma hears a rumor that Haruto's a slut, Souma's mood appears to turn sour.. and he drags Haruto to a love hotel and..? An S-class, antisocial kouhai, and a spoiled, slutty senpai. They've both been secretly in love with each other for a long time and now their sweet love story can finally begin!.