Arc 1The Wind on the Mountain
Uchiha Gua used his idle-training system to grow stronger while trying to prevent Itachi from becoming a threat. After a mountain conversation changed his mind about killing Itachi, Gua was abducted by Orochimaru for an experiment.
- Uchiha Gua began training with his idle system at the Academy, quickly improving his chakra, taijutsu, eyesight, and shuriken skills.
- Gua befriended Itachi and repeatedly impressed classmates and teachers with feats he attributed to cheats, while Izumi sought his attention.
- Gua learned the Great Fireball Technique from Itachi and reconciled with Izumi by leaving her a lunchbox.
- Gua planned to kill Itachi during a mountain climb, but Itachi shared his thoughts about life and Gua let the wind decide whether he would act.
- After the wind turned north, Gua spared Itachi and headed home alone.
- Orochimaru stopped Gua and took him to a hidden woodland laboratory, where Gua distracted him by warning that an uncovered petri dish could be contaminated.