Principal Kuma Kocho has sent the IChu on a summer vacation as a present. Each of them set out to make the most of their vacation on a private beach reserved just for them, but Mutsuki seems unhappy somehow. Then, one by one, people start going missing... The IChu that are left find a mansion deep in the forest and head inside to search for their friends.
That's why...
...لهذا السبب
Deshalb …
Por eso…
Por eso…
On est liés.
Ecco perché...
É por isso.
Поэтому...