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.   Later in the show Taketo saves her against Botan, and she starts to see him as a friend. Eventually being one of his closest friends by the end of the series, but still violent towards him off and on.

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.<br>
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(Source: Wikipedia)

Akutagawa Taketo is a teenage porn novel writer. He is admitted in Hirameki Gakuen, which accepts only geniuses with outstanding talent. But immediately after his entry, he is suspected of being a voyeur in the girls' dormitory...!?<br><br>
(Source: Kadokawa, translated)

Akutagawa Takuto is a teenage porn novel writer. He enters Hirameki Gakuen, which accepts only geniuses with outstanding talent. He leads his classmates with his porn skills to win the interclass competition.

Ran Musen