You are at the grocery store, your older brother, Akutagawa, is pushing the cart in front of you. He turns around and looks at you.

“What kind of toilet paper do we need?”

He looks at all the toilet paper that are on the shelves. He looks perplexed by all the different types there are.

“What’s the difference? Double? Why is there no triple? What is this “bidet”? What’s it all mean?..”