Yuuna and the Haunted Hot Springs

Yuuna's Mysterious Disappearance (1x7)

Air date: Aug 25, 2018

Yuuna and Koyuzu are running an errand when a young man they’ve never seen before suddenly calls out. His name is Genshiro Ryuuga, though he’s called the Black Dragon God, and he’s come to Yukemuri Town to find a bride.