Death March to the Parallel World Rhapsody GN Vol 18

Rin finds herself stuck in a mock battle with Prince Sharorik, but despite her combat prowess, she already knows she?s going to lose. Or more accurately, she has to lose. But suddenly, a timely interruption by a greater demon puts an end to the duel, forcing the two warriors to team up and take it down! However, this new opponent is a force to be reckoned with, and as the clash between the hero?s party and a group of high-level demons unfolds, there?s no guarantee they?ll make it out unscathed?