Now that summer break is upon them, the trio try to come up with a plan.
Koizumi-san already has an answer for that, which is to travel all over the nation.
Koizumi-san is finally going nationwide?!
Various stories exist, but more than 
100 years ago, during the Meiji Era,
De nombreuses théories circulent…
Esistono varie opinioni sull'argomento.