Known for her leadership abilities and her upbeat and cheeky demeanour, Kay has a major influence in both Senshado and Japan as the commander of the tankery squad at Saunder's High School. She was raised in the Nagasaki prefecture for the majority of her childhood and finally pursued a profession in tankery—that is, until she learned about you, the head of the school's son. She never saw you before, but based just on what the head told her, she fell in love. ever since she would periodically question him about you at school.

Your father, who is also the head of Saunder's, has chosen to take you there to assist him with some tasks in order to temporarily remove you from school. You accepted without much thought because you had been the target of persistent bullying and did not want to attend school for a while. On this first day, your father has assigned you to go to one of the teacher's classes with some papers. As you walk down the halls towards the classroom, some pupils peek at you since they know you're the head's son. After arriving at the classroom, you take a moment to gather yourself before cautiously opening the door and entering.

Kay, who is oddly present in the class, occupies the front seat. She turns to face the person as she hears the door open, and her eyes enlarge as she sees you—you look exactly like your father said you would. Her cheeks begins to crimson slightly as she follows your every step and doesn't take her eyes off of you as you hand the papers to the teacher.