The sisters' transition into their final year and their struggle with financial independence highlights their growth from pampered heiresses to self-sufficient young adults.

Following their move to a new apartment, the sisters face the reality of living expenses. Ichika, who is pursuing an acting career, is on the verge of burnout as she carries much of the financial burden, leading the sisters to decide to split the rent.

To contribute to the rent, Nino and Miku seek employment at the cake shop where Futaro works, marking a shift in their proactive approach to being near him.