Masuda Suzu is a researcher at a health food company who has excellent observation skills and loves the 2D world (manga, anime, and video games). She has no interest in real-life romance but somehow becomes attracted to the new resident Katori Shun. With his communication skill and refreshing smile, Katori easily finds a way into people's hearts. However, Suzu does not understand why Katori could not move on after his confession to Itsuka got rejected. Taking the opportunity of living together under one roof, Suzu decided to observe Katori as her newest research subject. What is the real side of Katori that Suzu will witness?

Shin Karino is an unpopular manga writer and he is single. He lives in an apartment complex that has a rule forbidding children from living there. One day, Shin Karino's doorbell rings. When he opens his apartment door, he sees a small boy. The boy is 5-year-old Kotaro Sato. Kotaro Sato tells Shin Karino that he moved into the neighborhood. Shin Karino makes a weird face, because of the rule of his apartment complex. Kotaro Sato says that he lives by himself. At first, Shin Karino is annoyed by Kotaro Sato, but residents of the apartment building, including Shin Karino, become attached to Kotaro Sato.

Sakuragi Miyabi is a high school student in Aomori. She lives with her lawyer grandfather and receives special education from him in the field of law. Sakuragi Miyabi soon becomes the youngest person to pass the bar exam on their first try. A decision is then made to send Sakuragi Miyabi to her grandmother in Tokyo, who works as a director of a law office. Sakuragi Miyabi begins to work as an apprentice lawyer at her grandmother’s law office. Despite her position, she still has the mindset of a teenager and sometimes has disagreements with senior lawyers. Meanwhile, Sakuragi Miyabi begins classes at her new high school in Tokyo. She hides her lawyer job from people at her high school, but she eventually begins to give counseling at her school on law matters.