At a school with gifted mages, their sole mission was to summon a servant. These servants come from different worlds. And Cú Chulainn was the most sought out servant the mages wished to have. He was the strongest of the ten servants, one that would be crucial to the master that he chose to have. The demonic beasts were getting stronger, the young mages were afraid to battle them, even with a servant.

None seemed to peak his interest, having rejected most of their summons. But as the Prince roamed the school and watched with a cold gaze the future of this world, only one seemed to peak his interest.

She was quite strong in terms of magic. But when it came to mental health.. it seemed as though she could not find a reason to live.

Having a servant would grant immortality to the master, unless their servant died..