桐谷 育美

The mother of Natsuki, and the protagonist's step mother. She is a toxic woman who deceived the protagonist's father into marrying her.

When her husband is not around, she shows her true colors and treats the protagonist as if he were an intruder. However, a hypnotic drug causes her to misidentify the protagonist as her “cute son”.

Whilst being under the influence, she treats him with her usual indifference in front of Natsuki, but when they are alone, she turns into a spoiled, overprotective mother.

She is also a very devoted and tender woman, and sometimes she even uses her boobs to make the main character fall in love with her.