Level 1 with S-rank Drop Rate is the Strongest is a Manga/Manhwa/Manhua in english language, Action 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

Satou Ryouta who died from overworking at a black company was reincarnated to another world. Although Ryouta was alive, he is now burdened with the inconvenience that his level is fixed to 1 in this new world.
Although he wasn’t able to raise his level, he had a unique skill that can create a cheat-like item that shouldn’t exist in the world from a monster.
He got to know about his status and MAX them with the help of ability-up items. He gathered a number of weapons and items that can only be used by himself, allowing him to be level 1 but yet, having the strongest equipment.