Gisou Kareshi wa Ichizu ni Watashi wo Hanasanai

Mio is a beautiful young woman who is highly regarded within the company for her work ethic. She has been popular with men since her student days, and as an excuse to turn down confessions from the opposite sex, she asks her childhood friend Naozumi to pretend to be her boyfriend. The two continued their fake relationship so that no one would find out, and before they knew it, 10 years had passed... When Mio decides she can't tie him down any longer and brings up the idea of ​​breaking up, Naozumi, who she had always thought of as a younger brother, shows a surprising side of himself... "I still want our relationship to stay the same." A pure love story between a shy career woman and a devoted younger man, as 10 years of love comes to life! (Source: Funguild, translated)