A harem as a definition is when someone has multiple lovers but I believe that the definition of the Harem genre is one who has multiple people in love with them. I believe this fits the description of this workHi! I just randomly checked the tags for this manga and... the Reverse Harem theme should not appear among them Imo. There is only one romantic relationship involving Yona, the others are only and ONLY about admiration. Ofc they're also all friends with each other. Please don't mislead new readers. :/