Trapped in a Dating Sim: Otome Games Are Tough For Us, Too! Novel Volume 4 was written by Yomu Mishima with illustrations by Moge Toi.

Possessed by the Saint while dungeon-clearing, Olivia dares to act against her bullies. Those actions quickly lead her to butt heads with Angelica, the prince's fiancée. The prince's soft spot for Olivia has Angelica's hackles raised, and she might finally lash out in earnest at the scholarship student…

Despite Olivia's difficulties with dungeon-clearing, Leon and Marie have been assigned that exact task. Their dungeon trip may prove just as disastrous as Olivia's! Even if they avoid outright possession, can they steer clear of the dungeon's myriad other subterranean dangers?!