Shirasagi Aika

She is a Japanese teacher at Aimine private school. Her husband works for a trading company and is a very serious person. However, he is often away from home due to his busy schedule. She loves and trusts her husband, so there is no problem in her life, but she is frustrated beyond belief.

Because of her innocent and gentle nature, she sometimes worries about her sexual desires without realizing that they are sexual desires. She also lacks sexual knowledge and is a good-natured person, so even if someone has malicious intentions, she cannot see it and is easily fooled.

As a former ballerina, she has a very flexible spine and hip joints.