The heroine of the story is a little girl who is soft on the outside and strong on the inside. She often beats her own brother violently, and her brother often causes trouble. He often designs all kinds of difficult things to spoof his younger sister. Not only is he tricky, he also shares tricks everywhere. Later, on his younger sister’s birthday, he made a wish to take his brother away as soon as possible. Unexpectedly, this wish will come true soon. Now, her brother instantly became the brother of her best friend, and the younger sister was very happy to finally get rid of this annoying person, and even sympathized with her best friend. As expected, her good best friend has lived a happy life every day since she had a brother. The life of being tricked, after the heroine lived a wonderful life as an only child, she found that her daily life gradually became very boring, except for making jokes with her good friends, the life also became very boring, suddenly one day she found that She discovered the secret her brother had been hiding all along, and after revealing the secret, she understood that only her brother is the one who loves her the most