In Konoha: Galactic Starburst from the Start

On the cannon-fodder battlefield of the Third Shinobi World War, Kakashi's classmate and a hopeless underachiever, Yeyue Shensi, activates the [Sanctuary Summoning System] on the brink of death! He gets a beginner's gift pack from the start, with a free draw for the strongest Gold Saint, Gemini Saga! Faced with a swarm of Stone Shinobi, Yeyue raises a hand and unleashes [Galaxian Explosion], vaporizing more than a thousand enemies in an instant! The battlefield is reduced to dust! His teammate and secret crush, Kurenai Yuhi, is so stunned that her jaw drops! When the Third Hokage sees the battle report, his pipe falls to the ground. “W-what level of forbidden jutsu is this?!” Yeyue simply gazes at the System, calmly considering who to summon tomorrow.