Selenophilia - Jikook

A crown hexed with a curse, a castle hidden behind high thorn hedges. A prince who reigns lonely over the dead. Hidden in the shadows, a raven is his only companion and friend.
And every full moon night the raven becomes a man of flesh and blood. One night to satisfy their lust, the passion burning in their bodies, the unbearable longing to feel the others touch.
One night to break the curse raven's curse.
The curse he had fallen victim to when he touched the crown of the prince almost a century before.

or

Soul JK is bored and slips through a door in the twilight world, where he meets the prince of death, Jimin, and accidentally touches the princes crown which leads to him being cursed.