Mari Hasamoto

Fumino, who has retired from her job as a high school teacher and is working in a hot spring town, is suffering from sexual violence from her father, Yoshiaki. One day, Fumino is reunited with Kimura, a former student of hers.

Achilles the tortoise has been kidnapped! The owner, a graduate student Mei (Dohi Kiriko), runs around Kobe with a detective (Morii Masashi), taking JR, Sanyo Train, ropeway, and carlator one after another, and the story reaches its climax at Sumaura Mountain Amusement Park! What happened to the missing professor (Toshihiro Kimoto)? What is the huge conspiracy revealed at the top of the mountain? The end beyond your imagination awaits you at the end of the great leap!

Mei Terada lives her life alongside her mother, Kayoko, who suffers from dementia. Her father passed away six years ago, with no friends or lovers, she spends her days with her mother, who is gradually changing due to dementia.