Multi-Anime Fanfiction: Nurarihyon's Grandson, Longing

I never knew longing in my life, but once I did, it consumed me.

My body is like a drifting cloud, my heart like floating willow fluff, my breath like a silken thread.

Only a wisp of lingering fragrance remains here. I await the wandering traveler of great worth, but where has he gone?

When will these symptoms come upon me? At what time?

When the lamp is half dim, when the moon is half bright.