A teen living as hikikomori for two-and-a-half years is pushed to her breaking point in an ever-shrinking room while her mother tries to restore their relationship.

Nozomi Egawa and Ryōtarō Shiba are the new high school students in town. As a matter of fact, they've just moved into houses next door to each other. In a chance encounter, Nozomi realizes that Ryōtarō has genius reflexes and vision, so urges him to join the boxing club to realize her dream of seeing her brother representing Japan in the Barcelona Olympics. This is the story of Ryōtarō's journey to make that dream a reality.

Two baby girls were born in the same hospital: one of them is the daughter of an aristocratic family while the other belongs to a deprived household which lives in the slums of the city. However, the nurse-in-charge, Michiko, secretly switches the two babies due to a personal grudge, resulting in a change of fates of the girls from then on. Many years later, the lives of the two girls continue to be intertwined with each other, with the rich Miki ill-treating the poor Nozomi, yet both of them hold similar dreams to become a singer.