[R +18] R-15

R-15 is about a boy, Taketo Akutagawa, who attends a school for geniuses: Inspiration Academy Private High School. Taketo is a genius novelist and writes erotica. Despite negative perceptions many people have of him, he aims to be at the top of his class and be recognized as the world's greatest writer.

Characters:
Akutagawa, Taketo[Main] - A genius at writing erotic fiction. He is looked down upon by most of the other students, especially the girls who consider him a pervert. He also works on the academy's newspaper as a reporter and interviewer. He often gets nosebleeds whenever he finds himself in a state of sexual arousal.

Narukara, Fukune[Main] - A genius clarinetist. She is a shy girl who forms a close relationship with Taketo after he attempts to interview her and helps her in times of need. Although she knows Taketo is an author, she does not know he writes erotic fiction.

Meiki, Raika[Main] - A genius photographer. She often works with Taketo on the academy's newspaper. She likes taking photographs of Taketo during his most embarrassing moments. Because Taketo is her most useful model, she helps him in difficult situations so she can stay with him and take more photos.

Kuroki, Kurumi[Main] - The Newspaper Circle Chief. She runs the academy's newspaper for which Taketo writes articles and Raika takes photos. She is a first-rate genius even by the standards at Inspiration Academy. She is normally seen protected by two bodyguards and wearing a latex uniform with her top open, exposing her breasts.

Sonokoe, Utae[Main] - A genius pop idol. She is one of the most popular girls in the academy. She is also one of the few people who does not mind Taketo's erotic writing, admiring the fact he works in a difficult genre. Utae harbors feelings for Taketo ever since he helped her overcome a problem. She tries to go on date with Taketo but failed because of her shyness that people might find out.

Musen, Ran[Main] - A genius computer programmer. She looks down on Taketo the most out of all the students, often calling him a porno writer. With her skills she is able to hack into government satellites and computers. Ran's hacking abilities are so superior that she can hack anything. Ran is shown to be only interested in girls and hates Taketo, but this changes after Taketo helps rescue Fukune from Beni Botan.

Kagaku, Tsukuru - A genius inventor. She is scientist who has invented several machines and devices; most of these malfunction in some capacity, usually causing Taketo chagrin. She is normally seen wearing a white lab coat. Her name means "building science".

Enshuu, Ritsu - A genius mathematician. He is Taketo's closest friend and the one who tries to defend Taketo's work. He often gets aroused when Taketo talks innocently during conversation. Taketo makes him calm down by getting him to recite π. His name means π in Japanese.

Beni, Botan - A genius avant-garde artist. She is known for painting people's bodies and using other students as her canvases. Her family name "Beni" means "crimson"; a pigment.