My child can't be so cute

When he was five years old, he committed a heinous crime of treason, heresy, unfilial, and discord. He was known as the "heinous crime" and was stripped of his mother’s surname by his brother. He was forced to inherit his dying father’s surname. Even his original name had to be avoided, and the incomplete demon had to be killed.

At the age of 16, he entered the First High School Affiliated to the National University of Magic and Technology. Would he be able to regain everything he had lost here? A doting younger brother, a serious younger sister, a sleeping mother, a sleeping father, a taboo name…and, those, nine older brothers and sisters: Hades, Shiino Lantern, Stella Russier Aznapur, Muto Rei, Charm of the Heir of the Two Worlds, Yuri Neso, Michael Cloe-Jev, Ke ’er, Mihoko, and even Koji Mengyu...

" The sword is a lethal weapon, and swordsmanship is a killing technique. However, the way of the sword is definitely not just a way to kill. What Father taught me…"