I Accidentally Forgot You

When Yu Weier returned home, a stranger suddenly appeared in the house. At first she thought she had opened the wrong door, but then she looked at the house number and realized that it was her home. Who was there? Just when she thought there was a burglar in her home, her dead parents came in from the door. And that thief is actually her brother? How come she has a biological brother, but she doesn't know about it. Intention: Face life bravely and smile at life