19-year-old Saeki Urara leaves behind a farewell letter to her mother Sayuri and boards a late-night highway bus bound for Tokyo.
The day before was her nineteenth birthday and Sayuri had revealed that the father Urara had thought dead, is actually alive and she is carried away by an impulse to meet him.
While Urara is grateful to her mother for raising her single-handedly after the divorce 15 years ago, she resolves to live in Tokyo, the glittering metropolis that she admires.
At her wits end, Urara is introduced by Serizawa Hanako, whom she met at the Shimokitazawa flea market, to a shady man.
The man who holds out 20,000 yen and declares "Buy pants" to a stunned Urara is her father whom she is seeing again for the first time in 15 years!