I Got a Cheat Skill in Another World and Became Unrivaled in the Real World, Too, Vol. 5 (manga) — Miku

It's time for the Ousei Academy camping trip! Yuuya and his classmates head into the wilderness, where they'll need to build shelters, find food, and otherwise fend for themselves. Yuuya quickly steals the show (and several of his classmates' hearts) after saving the day, thanks to his maxed-out survival skills! And back in the other world, the day Yuuya promised to meet Princess Lexia has arrived. But an ambush cuts their reunion short when Luna moves to complete her mission and assassinate the princess! As Yuuya recalls their time training together in the forest -- and the bond they forged -- will he be able to do what's necessary to stop her…?