Seina Yamada has been waiting so long to return to his home, Earth.
But so much has changed; his sister is engaged to Kiriko's brother Kai,
and his parents' old store is now a huge mall.
Furthermore, he is to stay at Kiriko's mother's house...
Don't cause any trouble 
by cutting too loose.
لا تسبّبي أيّ مشكلة بمُشاكستك وشقاوتك
Reiß dich am Riemen und
mach den anderen keinen Ärger.
No te desenfrenes y causes problemas.
No te desenfrenes y causes problemas.
Reste calme
et ne te fais pas remarquer !
Vedi di non scatenarti troppo, mi raccomando.
Não cause problemas
ignorando as coisas demais.
Только, главное, не набедокурь.