What's Wrong with Being a Jerk?(2015)

Seikaku Kuzu de Nani ga Warui

Hanaura, a self-proclaimed jerk, is a bonified loner in his class. Suddenly, Tsuzuki, the most popular guy in school, confesses his feelings for him and kisses him...? For as much as he tries, Hanaura can't refuse Tsuzuki's advances, and when they're together, Hanaura begins to worry whether he can actually be of use to Tsuzuki, the perfect... This is a coming-of-age love story between two opposites: a high-spec elite and a cynical loner!

(Source: MangaPlaza)