18+ Uchikyaba: Ouchi de Cabaret Club shite Niichan wo Onnanoko ni Naresaseyou Daisakusen

Minato Anjou, 24 years old, is good at his work and people have high expectations for him. At this rate, climbing the corporate ladder will be smooth sailing! ...or so it seems. Minato actually has a huge problem! He can't talk to girls at all, even to the point of affecting his work. It was only when his senpai from work invited him out to a cabaret club that his life began to change! Thus begins the story of a loser's journey into the next-gen cabaret club!

(Source: Kodansha, translated)