On her way to school, Aoi, who can see ayakashi, encounters an ayakashi she's never seen and is abducted to Tenjin-ya, an inn in the hidden realm. There, she learns that her grandfather promised that she'd marry the master innkeeper to pay off his debt.
That's right. This is the hidden
realm where ayakashi live.
Exacto.
Oui, le monde où résident les esprits,
un monde invisible.
Isso mesmo. É o Reino Oculto,
onde os ayakashi vivem.