The Other World's Books Depend on the Bean Counter Vol 2

After a strange Saint-Summoning Ritual transports him to a fantasy world, Seiichiro Kondo just keeps on keeping on. But when he drinks a nutritional supplement to help with his exhaustion, the side effects cause a life-threatening magical sickness...!! And who should come to save him but his knight captain in shining armor, Aresh?! However, in order to cure Seiichiro and help him adapt to his newfound magical power, Aresh will have to get real up close and personal...