The teacher who is useless, the dormitory manager who has a loud decibel, and the classmates who subvert the theory of astrology books, even if three people are crowded in a small dormitory, they will be warmed by your company, dear classmates, dear partners, and dear family.
When he first entered high school, Reborn told Tsuna that these were his last three years as an ordinary person.
When he graduated from high school, Tsuna realized that Reborn was just joking.