
Momoka Yamada, an ordinary high school girl, finds her life turned upside down when her 70-year-old grandmother, Tamaki Yamada, somehow manages to rejuvenate to the appearance of a 16-year-old. The restless relative now constantly accompanies Momoka, leaving her no peace at home, at school, or in her love life. Can the different generations of this family understand each other? And how will they find a way out of this extraordinary situation?