Terumi's cousin and Kaoruko's niece. She dreams to be a librarian and loves manga. She is the first of the fourteen women that Terumi must conquer. She is based on Asagoa

Spoiler

Asahi went on a date with Terumi not knowing that she was Terumi's first target, on their date Terumi took her first kiss. And in Asahi's house they nearly had sex but were stopped when Asahi's mother came home. It is also shown that Asahi and Terumi were close with one another when they were young treating each other like sibling but drifted away when they got older. Asahi has started to have feeling for Terumi and grows to be attracted to him, but fears that he only wants to have sex with her and not really love her. She asks Terumi to have a platonic relationship with her to which Terumi refuses. It is also show that her feelings for Terumi is not platonic and that she was masturbating while thinking about him.

Asahi while with Terumi and Tsukiko met Aoi both of them seen not interacting with one another, Asahi has stated that she doesn't like her and shows a bit of jealousy to Aoi that she knows Terumi.