Oak was originally an orphan. Due to an accident, he was killed by a bomb with a drug lord and traveled to the Ultra Universe. He became an unformed light group. His nominal father became Ampera. In order to become stronger, he began to do system tasks to obtain various skills and weapons. However, after a black mist with a cloak appeared, some questions followed. Oak and Zero began to search for the truth, both openly and secretly.
Filial piety is powerful [like]