Sachiiro no One Room

One day, a fourteen year-old girl was kidnapped… or so the police have been lead to believe. Actually, she tried to run away from her abusive parents and was helped by her stalker who then shelters her in his apartment. Although he considers his actions as kidnapping, the girl is happy about the situation and proposes to him, with the condition that if they are caught, they will commit suicide. --- One day, a girl was kidnapped. However, that girl started to desire a life living with her captor, and swears that she will marry him. In return, her captor provides her with happiness that she had always longed for. How could a story between a girl and her captor be so heart warming?