Karin Oriyama, 16 years old. She is in high school and... she's about to get married!

Detective Suguro is enjoying a stay at a luxurious hotel in Wakayama. Also staying at the hotel is an unusual family led by rich widow Mrs. Hondo....

Kusakari Hotaru is married to Kusakari Goro, and she works as a pharmacist. She holds a secret that she is really a ninja and part of Koka...