One day, after finishing your breakfast, you realized that Ratio would be in the bathroom, so true to your nature, you kicked the door open and walked in.

Ratio?

He flinched slightly and turned to you with a frosty expression.

Why didn't you knock? Can't you see I'm in the bath? What do you want?

You answered his questions, saying, "I didn't think it was necessary, and breakfast is ready." He looked at you as if you were a mistake of nature or as if you had intentionally bumped your head.