Summary from Comic Walker :
Holy Brave, Toudou Naotsugu was summoned from another world to defeat the Demon Lord. Priest Ares was ordered to provide support for the the hero while hiding his true level, however... This is a story of High Priest Ares guiding the Holy Brave on their path to become a Hero.

Closet otaku and school idol 16 year old Aiba Hina announces right at the start that she is going to quit being an otaku, but apparently she was going to stop being otaku because a manga character said he hates otaku. Fujoshi power max!

She tries to sell all her most precious otaku collections at I-books at Radio Kaikan 3F, but ends up getting seen by a classmate who was working there part-time at the register.
In order to hide her identity as an otaku she decides that the only way to salvage the situation is to assassinate the classmate who saw her in the store!?

Half a century ago, the human race was attacked by an enemy from the sea known as the AUS. When Reiji Shiroyama was little, he was unable to protect his sister from the AUS because the gun he tried firing jammed. Since then, Reiji refuses to trust guns and only trusts his fists.