RTA走者はゲーム世界から帰れない (Series) favorite_border

[DeepL Translation - needs review] Volume 1: The """fastest ever""" otherworldly fantasy in which players fight with the help of bug techniques! A man who has mastered RTA (Real Time Attack) is summoned to the game world! He is asked to defeat the Demon King as a hero, but he uses a bug technique to immediately attack the RTA. However, the game doesn't end even though he defeated the last boss...?

(Translator: DeepL)