The Other World's Books Depend on the Bean Counter, Vol. 1 — Yatsuki Wakatsu

Once upon a time, in the not too distant past, a holy maiden was summoned. Not just any holy maiden -- one hailing from modern Japan. But this story is not her story. This is the tale of the humble accountant, Kondou, who accompanied her and his trials and woes as he accounts in a new world... But no tale is complete without a love interest. And who better to play that role than the handsome knight captain Aresh? Will he begin a personal quest to save said bean counter -- who toils around the clock -- or is Kondou doomed to be married to his work evermore...?!