Rinosuke's father, who was useless and vagrant, is now dead. At 16 years old, Rinosuke is completely alone and must quit school to survive. On the night of his father's death, a naked woman with large breasts falls from the sky and lands on him. She introduces herself as Sakamoto Marina, the future wife of the future Rinosuke. She claims to have used a time machine to return to the past and start a new life with the younger Rinosuke. Rinosuke's new life with his future(?) wife begins.