Futaro is hospitalized for a while after falling sick at camp school. He returns to work tutoring the quintuplets, only to realize someone has fallen way behind.
It can't be anyone else.
Ich kann keinen anderen fragen,
wenn wir doch beide so einsame Seelen sind.
Non voglio chiedere a qualcun altro.
Não pode ser outra pessoa.
Другие не подойдут.