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 it's predicted 
that in a century or so,
،لكن من المُتوقَّع أنّه بعد قرن أو ما قارب
ma si prevede che, dopo circa un secolo,
mas se prevê que, em um século ou mais,
но, вероятно, примерно через сто лет