|Eye Color||Egyptian Blue|
|Relatives|| Unnamed Mother|
Unnamed Younger Brother
|Manga Debut||Vol. 4, Ch. 18|
|Anime Debut||Ep 1, OVA 6|
|Voiced By||Yoriko Nagata|
Miharu Mikuni (三国 美春, Mikuni Miharu) is a 15 year old, first-year high school student.
Mikuni has short, black hair (blue in the anime). As she is short-sighted, she wears a pair of glasses. She is one of two characters with the biggest bust in the series which Keita notes when he first hugs her.
Mikuni is a fairly quiet character. However, unlike other girls, she is meek, comparatively tacit, intimidated and predisposed to anxiety. Mikuni's relationship with Keita is mostly platonic, even though it is obvious she is attracted to him, even fantasizing about him raping her and experiencing an orgasm from him giving her a piggy back ride, she keeps her distance because of his sisters as well as her own inexperience around boys. People often mistake her being involved with Keita, and she will most of the time become caught in the cross fire of many of the twins’ antics (which she comments on in chapter 25).
Mikuni is the only girl Keita gets nervous around, suggesting he might have feelings for her. As she has a weak bladder, she occasionally wets herself, usually in front of Keita, but he promises to keep those times a secret. One time was when the school authorities accidentally locked them in the school gym where they were hiding from been found out by Ako and Riko and she needed to pee. She eventually pee on Keita, who was carrying her to help her escape from the gym window.
When she returned Keita his acceptance letter, Keita, who was out of a combination of stress from believing he was rejected and relief at finding out he was accepted, hugs her out of the blue. After that action, she has shown an attraction towards Keita, often blushing when they talk and feeling very comfortable when he hugs her, but overall states she has nothing to do with him.
Even though she does not go after him, his sisters still see Mikuni as a possible rival for Keita’s heart. Though after being informed by Ako and Riko that Keita appears to be in a relationship with Yuzuki, she has been looking at him with a clear indication that she might be realizing her feelings for him.
Keita - She and "Suminoe-Kun", as she calls him, started off as strangers. The relationship between them have grown quite rapidly however, as she trusts Keita enough to keep the secret of her wetting herself and opens up to him about her anxiety when it comes to racing. Despite her growing attraction to him Miharu tries to deny her feelings even when all the evidence points otherwise: she and Keita almost kissing, her masturbating to the thought of Keita raping her, her cumming while being carried on his back, blushing when he offers to take her home, her asking Keita "to take responsibility" for seeing her without underwear, and grinning uncontrollably when she thinks about whether or not Keita masturbates to the thought of seeing her without underwear and that he was willing to take responsibility for seeing her like that. She also notes that being hugged by him felt comfortable and that he's her only male friend.
- Miharu suffers from enuresis, a bladder disease, which has become a running gag of the series.
- In the anime she was a school librarian, while in the manga she is on the volleyball team.
- She's the only character with a pet.
- Miharu has a rape fetish.
- She and Keita hug and almost kiss in the gym storage room in the manga, whereas in the anime Keita accidentally falls on top of her.
- Miharu's role in the anime was greatly expanded as she was groped and otherwise molested by Keita for much of the story. In the manga she wasn't introduced until she returned Keita’s acceptance letter her dog had stolen.