Giotto, the founder of Vongola Company, was a 16-year-old boy. He met Tsunayoshi Sawada when he returned to Japan to visit distant relatives. Tsunayoshi was only 8 years old at the time. The innocent and lovely Tsuna slowly melted Giotto's long-frozen heart in the process of getting along with Giotto, allowing Giotto to let go of his guard. However, the time they spent together was very short-lived. Giotto had to rush back to the company to handle matters. In order to protect Tsuna Guitar, he decided to make the young Tsuna Yoshi his heir. This decision changed Tsuna Yoshi's future.
Eight years later, Giotto returns to Tsuna as an English teacher, but Tsuna has undergone earth-shaking changes...
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