Gundam Build Fighters

Sei Iori, who has a personal connection to the Gunpla World Tournament, aims to become a champion. His father was a finalist in the competition, but Sei struggles with the actual combat aspect despite being skilled at building Gunpla models. He's aided by Reiji, a boy with exceptional skills in piloting Gunpla in virtual battles, who is also somewhat detached from societal norms. Together, they decide to team up to win the Gunpla World Tournament.