Rennyuu Order: Okawari The Animation Episode 1

One day, the main character Takayuki, who is living alone in Japan apart from his parents who are in a faraway country due to excavation of ruins, suddenly appears to Sasha, a brown heroine who is the princess of the mysterious country of Al-Fajjar. She carries a letter from her father, which says that Sasha has become Takayuki's wife. Takayuki is confused, but Sasha immediately asks for her husband's business in order to be given her heir. . .