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...
But why Earth?
لكن لماذا الأرض؟
Aber wieso hier?
¿Por qué en la Tierra?
¿Por qué en la Tierra?
Mais pourquoi sur Terre ?
Ma perché sulla Terra?
Mas por que na Terra?
Но почему на Земле?