Saitou and the others have returned to their everyday lives. Then, one day, Lafanpan takes a bath in a mysteriously pattered cup and something completely unexpected happens.
I can't think of any other reason for it.
لا أستطيع التفكير بسببٍ آخر
No se me ocurre
ninguna otra explicación.
No se me ocurre
ninguna otra explicación.
Non mi viene in mente nessun'altra
 spiegazione plausibile.
Não consigo pensar em nenhuma 
outra razão para isso.
Другой причины просто не вижу.