From the introduction:
Welcome to Katekyo Hitman Reborn, something that would appear to be just your average ordinary world. However, if you know where to look, the right questions to ask, and to whom, something lurks in the shadows. Hidden behind Omerta, a worldwide vow of secrecy, lies the secret weapon of the mafia, yakuza, triads, and every form of organized crime. This power is referred to as ‘Flames’, or the full and proper name of ‘Dying Will Flames of the Sky’. Policed and enforced by the mysterious Vindice, for all the light cast by these Flames, they will never see the light of day. The Vindice have few rules, mostly a code of conduct to prevent those with Flames from wiping out those without, but keeping Omerta lies above all. If you don’t, the boogeymen of the Vindice will come to get you.
User summary:
リボーン REBORN! is a solitaire adventure adaptation of the 家庭教師ヒットマンREBORN! manga franchise.