Jun Shirasaki and the Jinguuji sisters are childhood friends and neighbors. When Jun's first girlfriend, the older sister Rumi, breaks up with him, she says something that complicates the three people's relationship, their first loves, and their romance—? (Source: MAL News)

Despite a rocky start to their relationship, second-year high school students Mao Tsuchiya and Hisashi Ootomo have managed to find a way to coexist in their dorm room for another year. The roommates swear to abide by three simple promises: Mao must refrain from outing Ootomo as gay and having a boyfriend; Ootomo, in turn, must not fall in love with Mao; and the two must respect each other's privacy when one of them needs time to himself. While these are simple asks, the school's film club's new project suddenly puts them at risk. The club's short film for the year is a boys' love story between a class president and a delinquent—a role for which Ootomo is considered the perfect fit. As the principal photographer in charge of composing every scene, Mao oversees all of the intimate moments between the leads, and though he wishes he could deny it, his growing attraction to his roommate is affecting the movie's production. But as things start to intensify—both in the film and in his personal life—Mao is soon forced to confront these complex emotions head-on.

Eiji Kitahama has a dream shared by many high school guys: to be popular and have a harem of girls fawning over him. Luckily for him, his new junior in the drama club, Rin Nanakura, has decided to help him realize this wish. Using her impressive acting abilities, she takes on many personalities, from teasing to calm and collected, to play characters in Eiji's simulated harem. As her connection with Eiji deepens, Rin expands her repertoire, quickly swapping between characters while enjoying high school life together in the club. Through her acting, the real Rin Nanakura tries her best to win Eiji's heart.

Seirei Academy is a prestigious school attended by the very best students in Japan. Alisa Mikhailovna Alya Kujou, the half-Russian and half-Japanese treasurer of the school's student council, is known for her intelligence, stunning looks, and rigid personality. Contrasting her near-flawless persona, Alya's unmotivated classmate Masachika Kuze slacks off during lessons and seems to show no interest in her. Initially irritated, Alya gradually becomes more intrigued by Masachika and starts expressing her affection for him in Russian. However, she is oblivious to his secret—he understands the language fluently! Due to a childhood friend who was temporarily staying in Japan, Masachika has been studying Russian in hopes of reuniting with her. As the two spend more time together, the playful and eccentric relationship between them quickly deepens. In the meantime, both must learn to navigate their new growing feelings for one another.