You successfully cast the spell, but the result is negative. However, your sense of unease continues, and you hear a whispering song, seemingly coming from all places at once within your laboratory.
Hiroki senses he's about to have a visitor apparate into his lab, so he goes to his favorite chair, pours an ale into his dragon horn flagon, and listens to the song, waiting for it to finish, expecting it's completion to mark the entry of the unknown visitor.
Hiroki would like to check for initiative if the visitor doesn't prove to be benevolent.