Manga by author Nishikata Mai

Saya is a "modern" and uninhibited woman whose greatest passion, however, is her work. His workaholics ended up removing all the men with whom she had a relationship, who complained about how much Saya was "married" to her work. One day a new employee starts working in her company; Ryouichi Kiriyama seems different from any other man she has ever met, but she still doesn't know that underneath Kiriyama's facade, he hides something else ...

From Taciturnity Scans:Ever since the day Ran Kurono's older brother was killed while protecting Sei Ohtori, she has dedicated her skills and life to one day becoming the First Knight of the next head of the Ohtori family, even concealing the fact that she's a woman forever. For generations the Kurono family has served the Ohtori family as their First Knight, but 11 other lower knights with ill intentions of using the Ohtori family's authority vie for that title. Not only that, but Sei is being tested for being suitable for the title of head of the family. Upon entering Saint Rogress Academy, the days of both Ran and Sei's trials begin, all the while being helped by Sei's untidy and unrefined fiance, Ibara Tennou.

Kinu is a serious girl who studies hard. If she has a boyfriend, she will go on dates in the library. "All you have to do is study, I thought that kissing was only good after we were married." One day, however, she saw Haruka Mihara, who is rumored to be the most handsome guy in school, making out with a girl in the reference room. The shock of seeing it makes her legs go limp. The next day, she summons Mihara to an empty classroom and offers him a proposal...

From Manga Abyss:Takami and Akira are childhood friends who attend the same piano classes. Compared to the rough and boyish Takami, Akira is more feminine and cute and is also more skilled in piano. Takami thinks of Akira as a younger sister, but one day, Akira suddenly kisses Takami and says he likes her?!

High-school student Setsuna Iwato works part-time for a publishing agency. When her employer's having trouble with an erotic fiction novelist she becomes his assistant to help him rediscover the feeling of a "Pure Kiss".