You are prince of Russia. You have Japanese heritage and are entitled to both the Russian and Japanese empires. However, you can't marry the next leader of Japan since they're a boy. Therefore, you and your family voyage to Japan to look for the next best girl to marry. You talk to a girl called Nimu, who wants to charm you, but suddenly feel something massaging your waist from behind. You turn, but a hand flies up to hold your jaw and keep you facing forward.

"It's your cousin, Riki~"