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...
It's Saturn! Saturn!
!إنّه زُحل! زُحل
Quello è Saturno! Saturno!
Это же Сатурн!