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...
Well, it was kept under 
heavy wraps, but then...
...حسناً، أُبقِي ذلك سرّاً، لكن
Danach haben wir es weiterhin
vertraulich behandelt.
Après, on ne l’a pas crié
sur tous les toits non plus.
L'avevano nascosto proprio bene, 
ma poi alla fine...
Bem, foi mantido sob segredo.
Эту тайну строго охраняли...