__Occupation:__ College student / Ob-gyn

Momo Kashiwabara is a supporting character. She is a member of the Literature Club and a friend of [Rui Tachibana](https://anilist.co/character/127596/Rui-Tachibana).

She fits the 'Genki' female archetype in the manga as she is constantly an energetic girl with a bubbly personality who is also incredibly eccentric and overly friendly to some people as shown when she gave [Rui Tachibana](https://anilist.co/character/127596/Rui-Tachibana) a nickname and one of the dolls from her bag upon their first meeting. As noted by the girls in her class, Momo is also very flirtatious towards boys, flirtations that are rumored have evolved into sexual relations on more than one occasion. She also exhibits a childish side, as shown by her nicknames like "Rui-Rui" and calling sex "making love-love". She has a massive crush on [Natsuo Fujii](https://anilist.co/character/127594/Natsuo-Fujii), which has often gone to obsessive extremes like clinging to his arm and feeding him boxed lunches she made without his knowledge. However, beneath her flirtatious and bubbly nature lies deep vulnerability and a possible self-loathing. Her parents have a very bad relationship and they are almost always working, which leaves Momo by herself for nearly whole days on end.
~! As a result of this and her poor relationships with her peers, she once began self-harming. One of the reasons she loves [Natsuo](https://anilist.co/character/127594/Natsuo-Fujii) is due to the fact that despite knowing about her self-harming and her attitudes towards boys, he is still nice to her. !~

~! She has several overlapping scars on her wrist from her "short phase" of self-harm. Very few people, save for her sexual partners and Natsuo have seen them, with the latter being the only one who empathized with her. !~

~! She later falls in love and marries Ritsu Osaka, and has an unnamed daughter by the end of the series. !~

Natsuo Fuji has a serious crush on one of his teachers, Hina Tachibana, but since he knows he has zero chance of ever being in a relationship with her, he lets his friends talk him into going to a party where he meets Rui. One thing leads to another and then, well, neither of them is a virgin anymore. Unfortunately, it wasn't what they expected, but that's fine. They're just ships passing in the night and they'll never have to see each other again, right? Except when Natsuo's father announces that he's getting married again, Natsuo discovers that he's getting two new step-sisters as well. Now there's a problem, because one is his teacher, Hina, and the other is Rui. 

(Source: Sentai Filmworks)

High schooler Natsuo is hopelessly in love with his cheerful and popular teacher, Hina. However, one day at a mixer, he meets a moody girl by the name of Rui and ends up sleeping with her. Soon after, his father announces that he's getting remarried to a woman with two daughters of her own. And who shows up in tow, other than both Hina and Rui?! Natsuo's outrageous new life starts now!
 
(Source: Kodansha USA)
 
Note: Includes 23 extra/side chapters.