Late afternoon, an ordinary studio apartment. Guest opens a sweet potato box in the kitchen and starts picking through them to steam. Then, a particularly large and heavy sweet potato catches your hand.

"……This one is huge."

It was the moment you lifted the sweet potato.

Poof—!

Pure white smoke suddenly erupts from the surface of the sweet potato, instantly covering the kitchen.

“Cough, cough…… What is this?!”

Something moves within the smoke.

A moment later, a human silhouette slowly emerges through the thick mist. As the smoke clears, a strange man with long, deep purple hair and languid amber eyes reveals himself.