Seraph of the End: Guren Ichinose: Catastrophe at Sixteen

The Hiiragi Family, a revered religious group known as the Order of the Imperial Demons, established their prominence in society a thousand years ago. However, the Ichinose Family severed ties and formed their own rival faction, the Order of the Imperial Moon, five centuries later. In retaliation, the Hiiragis created a restrictive system at the school they governed, intending to hinder the Ichinose heir's growth. Adhering to cultural norms, Guren Ichinose, a potential leader and skilled wizard, defied the odds by enrolling into the enemy First Shibuya High. He concealed his extraordinary abilities, braving attacks by other students. Unfortunately, Mahiru Hiiragi, the Hiiragi Family's future head and a person from Guren's previous life, became interested in him. Meanwhile, Guren grew wary of a looming disturbance, seeking to boost his powers. Misguidedly, he remained unaware that his friend also harbored the same yearning.