Des:The Kawana siblings lost their parents when they were young. Her older sister Airi graduated from junior college and became an office lady. On the other hand, her younger brother Tatsuo was playful and didnt study well, but Airi was very fond of Tatsuo, who was her only family. One day, Airi receives a call from a yakuza named Kawagoe on her mobile phone. ``Your younger brother harmed the sister in our group. Eventually, Airi ends up being laid down by Kawagoe and the others in order to gain favor with her. She is also betrayed by her brother in front of her fiancé...