Blind Leek
If you are wondering, this link is for the first and second chapter that the translator supposed to translate. Feel free to read it but beware because it straight out from Google translate but still barrable to read only for the first two chapters. https://***.mtlnovel.com/i-really-am-not-the-lord-of-demon/chapter-1-late-night-customer/
NOTE: Don't forget to read the first two chapters! Just go to mtlnovel website and type in the same title as the one we currently have in webnovel. The chapters were quite easy to understand despite being mtl-ed and it is a MUST read since introduction of the character and first customer (and the mysteries of the bookstore) is at first chapter and another info about the bookstore and the world(s?) is at second chapter.