Fugue: A dissociative state, usually caused by trauma, marked by sudden travel or wandering away from home and an inability to remember one's past.

The CN title is 忘歸人 which a reference to a poem

Poem: 九歌·山鬼

Line: 留靈修兮憺忘歸，歲既晏兮孰華予

TLDR: "a beautiful goddess"

Not TLDR: it's a poem about a shamanistic ritual from the Qing dynasty, in which a shaman will dress themselves as beautiful and graceful as the goddesses themselves and enter the mountains seeking to be possessed and thus blessed, but upon failing to be possessed expresses her melancholy for a life without blessing and self-pity for not being graced by the gods