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What happened to Flight 298?

Chairman of the Shin Nihon Kaihatsu company Fukazawa, using clever ways to circumvent the law, rose to the top of the economic backstage. Three people are sacrificed to his greed. The president of a small company who committed suicide, a Yakuza who died during the destruction of his territory, and a former viscount whose wife and property were stolen by Fukazawa. Their sons vowed to hunt down Fukazawa and take revenge.