The story of Brother Ace and the strange girl who is always 17 years old.
Anna: "Hey, stop hiding! I've even seen your bare butt when you were a child!"
Ace: "..."
Anna: "Ah! Since when have you been taller than me?"
Ace: "..."
Anna: "Oh, Mom, it's not easy for me to raise you up like you're pooping and peeing all the time... Just live well!"
Ace: "..."
Intention: