The MC is real younger son of the rich family. However he was exchanged with the fake son. However when they find out the don't care about him. And he commite suicide by jumping from the building. He relived that he is living in a book. And the fake son is the protagonist. He came back to the past but this he does not want to do anything with his family and the protagonist. He is orphan but he have a lot of people who likes him and treats him like a family. Also three girls get kidnapped and he saves them with other people.