Matsutaro hasn't been home since he joined the world of sumo. He decides to go back to his province on occasion of having won the Makushita-level championship. He's greeted by his five siblings who grown quite a bit since he'd last seen them, and of course by his mother.
It's because you've changed, Sakaguchi-kun.
Das liegt wohl daran, 
dass du dich verändert hast.
Es porque has cambiado, Sakaguchi-kun.
Es porque has cambiado, Sakaguchi-kun.
Quem mudou foi você, Sakaguchi...