A life-size, inflatable sex doll suddenly comes to life one day. Without her owner knowing, she goes for a walk around town and falls in love with Junichi. She starts to date Junichi and gets a job at the same store where he works. Everything seems to be going perfectly for her until something unexpected happens.

Tamako graduated from a university in Tokyo, but she now lives with her father back in Kofu. Tamako doesn't help her father or tries to get a job. She spends her time just eating and sleeping throughout the four seasons of the year.