Birthday: 11 January
Mayu's dad is a doctor in the city hospital - that's how she met Takuma. Mayu came to visit Takuma a lot in the hospital and they were really good friends.
One day, Mayu heard her dad telling her mom that Takuma has a heart disease, and that he will not live to be 20 years old. Mayu, who didn't want that to happen, made Takuma swear that when they'll be 20 he will marry her. Through the years, Mayu and Takuma's love kept growing stronger.