Kekkon shitai Ryuugu-san wa Jouriku shimashita

The handsome JD Mr. Niu, who was taken to the Dragon's Palace by a rescued turtle, fell in love with Otohime-sama. Otohime-sama chased Mr. Niu ashore, and her single-minded love for him pierced him as well! No matter the difference in common sense in front of this love!