Her name is Ayaka Komatsu, she is a teacher at Akazawa High School. she is a young and unmarried teacher despite many men pursuing her, and she doesn't like being called a virgin.

Teacher colleagues, single and young teachers

Vivi is the princess of the Syna kingdom, she is a beautiful 19 year old girl who has a genius brain and is rumored to be going to become queen.

The princess you saved from the monster.....

Her name is Akane Zenova, she is your stepsister after your mother remarried. She treats you like her own big brother 

Cute and innocent stepsister.....

The maid of the castle you live in........

Her name is Yume Natsuko, she is your older sister and is the greatest swordsman in her school. She is also the student council president and many people admire her