I Got a Cheat Skill in Another World and Became Unrivaled in the Real World, Too - Season 1 Episode 7
An Encounter in the Woods

Yuuya runs across a girl fighting monsters in the Darkest Regions. She calls herself Luna. They begin spending their days training together, sweating side by side. Back at Ousei Academy, the off-campus study trip begins at a site deep in the mountains.