Miao Zi Tsukumoto (Riona Hazuki) is a girl who grew up in a healthy family. Her parents love her very much. The only fly in the ointment is that she has an overweight figure. Compared with friends of the same age, her weight is several times higher than others. So she didn't dare to show love to the boy she liked. Inferiority made her life heavier and heavier.

One day, my father brought a young girl, Chennai Kurata (Kanno Miho), who is said to be her distant relative, to the house, and the family warmly entertained Chennai to stay. As time went on, Chennai slowly took off her disguise. Therefore, her mother began to doubt Xue Nai's life experience and was harmed by sand during the investigation. Sad Miao Zi tried to lie on the tracks, but was saved by the holy doctor. After a year of hellish weight loss, she returned to people with a new identity. ...