地上最強の弟vs.邪神!?

From Author Wars - https://authorwars.com/books/di-shang-zui-qiang-nodi-vsxie-shen-2462197.html

Overview:

Title: 地上最強の弟vs.邪神!?
Author: 藤孝剛志
Year: 2016
Type: Novels
Series: 姉ちゃんは中二病 / My Big Sister Lives in a Fantasy World
Number in Series: 7

Variant Titles:

2017. The World's Strongest Little Brother vs. the Evil God?!

Genres/Themes:

young-adult fantasy