Beryl, an omega who has lost his mate and is in debt, decides to have an arranged marriage with a noble alpha in order to save his family's home. However, a beautiful beastman named Shaia appeared in front of Beryl, and imposed some conditions on him in order for him to become his mate. First, he must join the same academy, second, he must become his squire, and third, he must have good physical compatibility with him. Shaia, however, has his own reasons to be mates with Beryl...