He will appear in Tales of Seikyu, a game set in a fictional Japan that opened in Early Access today. It's a slow-life game where the townies are yokai, and will allow for romance including him, but only some romance has been implemented yet.
He is a ramen shop NPC from the same game Yasha: Legends of the Demon Blade (百剣討妖伝綺譚) as the other stamped characters. His role is to make ramen for the main characters and give them buffing effects. There was also concept art on the official website.