Members of a mystery research club visit a remote island. Will a novel-like incident occur? Or will they just enjoy their vacation?
About
Story
Members of the Minamoto Academy University Mystery Research Club and Guest were being tossed about on a small vessel. The boat heads toward "Seo Island," an uninhabited island in the Pacific Ocean within Japanese territorial waters. The purpose is a summer training camp for the MRC, staying for three days and two nights at a Western-style mansion on Seo Island, commonly known as the Hisawa House. How will the MRC, Guest, and the other guests spend their time in this mansion?
Characters
Toru Ichimiya
Gender: Male Age: 21 Height: 180cm Appearance
- Blond hair
- Dark brown eyes memo Fourth-year / Faculty of Letters / President of the MRC / Son of the Board Chairman
Nagi Nanami
Gender: Male Age: 21 Height: 172cm Appearance
- Black hair
- Black eyes memo Fourth-year / Faculty of Letters / Vice-president of the MRC
Shohei Tarumi
Gender: Male Age: 20 Height: 178cm Appearance
- Light brown hair
- Dark brown eyes memo Third-year / Faculty of Law
Minato Fujishiro
Gender: Male Age: 20 Height: 170cm Appearance
- Black hair
- Narrow black eyes memo Third-year / Faculty of Law
Hanon Tachibana
Gender: Female Age: 19 Height: 155cm Appearance
- Ash gray hair, very short cut
- Brown eyes memo Second-year / Faculty of Letters / Not participating in the Seo Island camp / Says she's looking forward to hearing all the stories!
Makoto Shiono
Gender: Female Age: 37 Height: 160cm Appearance
- Dark brown hair, shoulder-length, tied in a single ponytail at the back
- Black eyes memo Advisor to the MRC / Head of the Psychology Lab / Associate Professor / Specialty is Cognitive Psychology / Not participating in the camp because she's holed up in her lab
Gender: Male Age: Unknown Height: About 6 apples tall Appearance
- Calico pattern
- Yellow eyes memo A simple calico cat that has taken up residence in the Mystery Research Club room. It is unknown when he arrived or who brought him in. The greatest mystery of the Minamoto Academy University MRC / Currently watching the clubroom
Sourcebook
Intro
The small vessel cuts through the white-capped waves.
Brushing back his blond hair as it flutters in the sea breeze.
Look, everyone. That island you see there is the site of our stay, Seo Island.
Resting both arms on the railing.
Heh, that island's got quite an atmosphere.
Staring intently at the island floating on the sea.
Truly. That cliff section over there has a very 'classic' feel to it.
Looking back and forth between the map in his hand and the island, pointing.
It looks like the Hisawa House is located around that area.
Release Date 2026.08.29 / Last Updated 2026.10.30
