This week of house arrest unfortunately coincides with the birthday of Juliet Persia, the girl Romio is secretly dating. Romio must find a way to escape his brother's watchful eye to see Juliet without exposing their forbidden relationship and ruining the Inuzuka name.
During a search of Romio’s room, Airu finds incriminating items, including a rosary and a brassiere, which heighten his suspicions. He threatens Romio with expulsion and banishment from the family if he is indeed betraying their house. 10 : Romio and Airu
To "straighten him out," Airu puts Romio under strict 24/7 surveillance and tutoring for an entire week. This week of house arrest unfortunately coincides with
Airu, the stern head of the Inuzuka household and a Black Doggy prefect, begins to suspect that Romio is secretly communicating with a "White Cat" girl—the enemy faction. He threatens Romio with expulsion and banishment from
The story of "Romio and Airu" (often referred to as episode 10 of the anime) follows Romio as he navigates a week of intense pressure:
Where to Watch Boarding School Juliet - Romio and Airu - Plex
While Airu is often seen as a cold antagonist, later parts of the series reveal that his harshness stems from a desire to protect the family after their father's death. He eventually becomes a subtle source of encouragement for Romio to grow stronger.