Suki tte Itta no Omae Darou ga!

When Akira was a child, the stage was where he felt like home. Many years later, he's still an actor, but not very successful. His distractions are visiting bars and occasional one-night stands. One night, he meets his former classmate Takao. Akira recognizes him instantly, since Takao was the one who told him: "I'm your biggest fan!" But now Takao doesn't even remember his former idol! Akira will not put up with this...

(Source: Egmont Manga, translated)