The Evolution Fruit: Conquering Life Unknowingly Vol. 7 (Light Novel)

In Vol. 7, the inter-school competition is on, and the demon cult finally turns on them. Seiichi uses his innate cheat ability to render the enemy powerless, but due to the magic he unleashes as a last ditch effort, he ends up being sent to the underworld, and suddenly death is upon him. However, Saria and the others left behind have every confidence that he will survive and make it back. Meanwhile, in order to come back to life, Seiichi somehow ends up defeating the king of evil spirits!
Notice: This book is written in Japanese.