The Devil in Twelve Uniforms

Based on the connection between "The Tale of Genji" and the real world, it tells the story of Rai Ito (Kentaro Ito), a young otaku living alone who failed to find a job, was dumped by his girlfriend, and has no advantage over his younger brother who is capable of both literary and martial arts. He is influenced by the lifestyle of girls with various positions and gradually grows up.