Matsu goes to Tokyo with the sumo-stable located near Reiko-sensei’s home, because why else would he want to go to Tokyo anyway?  Matsu however quickly angers his fellow sumo acolytes and professional senpais with his boorish disrespect.  But never mind them, he must first visit Reiko-san ...
What's the matter with your 
arm? Is something wrong?
Was ist mit deinem Arm,
 ist etwas passiert?
¿Qué? ¿Te pasa algo en el brazo?
¿Qué? ¿Te pasa algo en el brazo?
O que houve com seu braço? Algo de errado?