Summon the Night Angel

A mind-based magic trainee who was rejected many times when summoning angels, summoned the highest-level night angel who exists like a god by an unexpected chance. Since then, the summoning world has been in turmoil again, and the competition for Night Angel has continued one after another. Under various difficult tests, Night Angel relied on his persistence for his little master, and finally made the little master depend on him for life and death.