Rumi-chan Kyoushitsu

Rumi, 4 years old, lives with her big brother in an apartment at Aramasuo. Since he has become a salaryman and has to go to the office every day, she is bored during the day. Rumi goes to school with her sister Yoko, a fourth grader in elementary school next door. This is the beginning of heartwarming interactions with Yoko's classmates, her teachers, and the people of Aramasou.