Ace Kindergarten Teacher

How could it be so disrespectful? The younger brother doesn't want to call her sister; The brother doesn't want to recognize her as his sister; Even he has lost his former gentleness and elegance: "Do you understand my heart or not?!" Can she ignore all this and just guard her kindergarten? Can she not be the queen and not marry Prince Charming? Her biggest wish in this life is to have her own sunshine kindergarten. Dear, he can become the first male aunt in the history of the kindergarten...