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...
You haven't changed a bit, Kai.
لم تتغيّر البتّة يا كاي
Du hingegen bist wie immer, Kai.
Tú no cambiaste nada, Kai.
Tú no has cambiado nada, Kai.
Tu n’as pas changé d’un iota, Kaï.
Tu non sei cambiato per niente, Kai.
А ты совсем не изменился, Кай.