Zoku jūdai no seiten

Akiko Yasutomi, an 18-year-old high school student, lives in poverty with her mother Hisako, but she has feelings for her cousin, a medical student named Masato Miki, who lives upstairs. However, when Masato becomes a part-time tutor for Akiko's classmate, Natsuko Shigeno, and Akiko becomes close to Natsuko, Akiko feel…