身代わりの館

Jun is a young orphan trying to survive in the city by doing part-time jobs. One day after work, he is attacked by an unknown person, who kidnaps him and forces him to live in a house. The owner of that house had a little brother, You, who had the same face as him but he was lost in an accident. The owner and other people of the house think that Jun is "You" and are a little too glad to have him back. The other people are his cousin, doctor/lover, butler who knows the truth and few others. When Jun complains that he is not "You", they think that he just lost his memories in the accident. He feels suffocated in the house and waits for his chance to escape.....

[Edited from Aarinfantasy Forums]