Isekai no Senshi toshite Kuni ni Manekareta kedo, Kotowatte Heishi kara Hajimeru Koto ni Shita  

I Was Invited to the Otherworldly Country as a Warrior, but Refused and Decided to Start as a Soldier., I Was Invited to Join the Country as an Otherworldly Warrior, but I Refused and Decided to Start as a Soldier, 異世界の戦士として国に招かれたけど、断って兵士から始める事にした, I Was Invited to Join the Country as an Otherworldly Warrior, but I Refused and Decided to Start as a Soldier

Yukikazu Tosaku was a student in Japan who, during his break, received a summons from another world. As warriors, they were tasked with saving the world from crisis. In exchange for their services, they would receive a good life. However, before accepting the offer, Yukikazu's classmates encouraged him to consider his options carefully and think about how he could act going forward. Ultimately, Yukikazu decided to leave the castle and explore more of the world in order to build his own reputation as an adventurer through his own merit rather than relying on preferential treatment.