"Monban Yattero" to Iware Juugo Nen, Tsuttatetteru Aida ni Ore no Maryoku ga 9999 "Saikyou" ni Sodattemashita is a Manga/Manhwa/Manhua in english language, Adaptation series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

Although Royle is blessed with a good physique, he was told that he had no talent for fighting, and was forced to work as a lonely gatekeeper for 15 years. While he is working, all he can do is fantasize about the adventure stories in which he is the main character, and his job as gatekeeper is replaced by an automatic surveillance interception magic tool and he is laid off.Loyle is at a loss, but along the way he meets the saint Diz. After meeting her, he discovers that the strongest original magic that was available in her delusions can be used in realityAn exhilarating story about the strongest man with no communication skills and 9999 magic power who becomes an adventurer and becomes unrivaled!