Mai Sugimoto, an 18-year-old college student, had high hopes for her new college life. However, due to a realtor's error, she finds herself sharing a living space with two women who share her exact name and age. In Mai's Room, the three Mai's embark on a journey of excitement and fun, but will they be able to get along and form a bond? Only time will tell in this tale of three young women navigating life. Additionally, the volume includes one-shots: Gemini and Jouji no Shita.