From Yen Press:
The sequel series to Unnamed Memory! One day, college student Shizuku Minase stumbles from modern-day Japan into a fantasy world. While wandering through a backwater region of this world of sword and sorcery, she meets Eric, an eccentric young man studying a magical script. The pair strike a deal: He'll help Shizuku return home if she teaches him Japanese. Thus the pair set off across the magical continent of Farsas in search of a way back to Earth.