Keitaro, Mutsumi and Naru played together as kids at Hinata House. Mutsumi's mom worked there, and Naru, who was sick, came for her health. Mutsumi told Kei the story. She is said to be a graduate student at the time of Keitaro and Naru's wedding, and in the official setting book Love Hina Infinite, she is mentioned as a student at Tokyo.

Mutsumi Love Hina
Mutsumi Otohime is a gentle, frail, clumsy and soft-spoken 21-year-old woman who lives in Okinawa. Mutsumi is prone to catatonic fainting spells that makes her appear as though she.