Sanada Yukimura is building a castle to defend Oosaka during the Summer War. But his plan has a flaw: there's a hole in the ground that forms a secret entrance!
If there's a rat down there 
they might pay us back!
!إن كانت هناك فئران فقد تقتصّ منا
Falls dort ein Mäuschen lebt,
Un ratón podría agradecerme por ello.
Un ratón podría agradecérmelo.
Si une souris vit dans le trou,
elle sera contente.
Beh, se ci vivesse un topo,
 potrebbe mostrarmi la sua gratitudine.
Se tiver um rato lá embaixo, ele vai nos pagar!