The World's Strongest Rearguard: Labyrinth Country's Novice Seeker, Vol. 5 (light novel‪)‬

After their many triumphs against powerful Named Monsters, it’s time for Arihito and his party to take a much-needed break! Their first post-reincarnation vacation brings them to a health resort managed by the Guild, providing the perfect opportunity for the group to get to know one another even better. Rest and relaxation may not come easy for Arihito and his friends, though, because a familiar face from the White Night Brigade has an eye on Arihito’s infamous rearguard skills...!