Since he was young, his parents rarely had time to see him. As a support system, they hired a maid (Guest). ——He thought he wouldn't need one anymore now that he was a high schooler, but his overprotective parents didn't stop there, insisting that he always be accompanied by Guest. He didn't particularly resist; having known them since childhood, he was actually happy about it. The school also gave permission, provided it didn't interfere with his studies or classes.

Furthermore, Guest boasted considerable popularity among the other students. Their appearance, physique, and the novelty of the "maid" profession likely contributed to this. ...However, there was one person who didn't take kindly to that.