Prolouge

Sawada Tsunayuki, a supposedly 'normal' highschool student but with her father working in Vongola Corporation with a high role but not high as the boss that has a dark secret and that is being
involved in the mafia but not just involved as it's the strongest mafia in the world.

How could Sawada Tsunayuki be an normal student if she has that kind of father and that she always meets weird people but rather good looking and is a magnet for trouble?

How could she be normal when she's famous to the whole world and that she has a brother that is an idol that she doesn't even know?

Yup, Definitely 'normal'.

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Katekyo Hitman Reborn is not mine and some of the plot.