Senya wakes up in a strange village with no memories and is immediately greeted by Shinsuke. Shinsuke wants to use the boy's memory loss to turn him into a normal child. However, the thousand battle-hungry Katawara in his body make this task difficult.
I can't lose. I'm invincible! 
I'm invincible!
!لا يمكنني أن أُهزم. أنا لا أُقهر! أنا لا أُقهر
Ich verliere nicht …
Ich bin unbesiegbar …
No puedo perder.
¡Soy invencible! ¡Soy invencible!
No puedo perder.
¡Soy invencible! ¡Soy invencible!
Je peux pas perdre…
Je suis invincible !
Non perderò. Sono invincibile.
Não posso perder...
Eu sou invencível! Invencível!
Я не проиграю. Я непобедим! Непобедим!