Kaoru Ueno, a 29-year-old office worker, is now 40 years old due to an accelerated aging process caused by a side reaction to a vaccination.
The only way to get back to her original body is to fall in love and have sex with someone she loves!
Kaoru wants to be with Seiji Yonezawa, a younger colleague she is attracted to, but he is also a patient who has had a side reaction to the vaccine and is actually 65 years old!
This is a love comedy about aging between two people who transcend their age difference!