Hayato is badly struggling with his weight and may need to drop out. Meanwhile, Yu is told by his idol group that they want him to come back.
He's locked himself inside his shell 
and is trying to solve his problems alone.
أقفل على نفسه داخل قوقعته
.ويحاول حلّ مشاكله وحده
Er zieht sich in sein Schneckenhaus zurück
und will alles alleine bewerkstelligen.
Se encierra en su cascarón 
y lo intenta solucionar todo solo.
Se encierra en su cascarón
Il se cache dans sa coquille
en essayant de tout résoudre seul.
Ele se fechou dentro da própria casca e está
tentando resolver os problemas sozinho.
Никого к себе не подпускает —
сам все проблемы пытается решить.