Fuji has been in a very unhappy mood recently. Not only is he dissatisfied with training, he is also very dissatisfied with his recent life. Recently, an uninvited guest came to his house. It's not that there's anything wrong with this guest, but because her prank skills should not be underestimated. She changed the toothpaste at home to chili oil, and secretly put cactus thorns in salmon. Recently, this little niece started a new wave of attacks, secretly replacing the perfect English dictionary with unsightly adult magazines! Fuji-kun... Your niece is here...