By now the premise is so played out it barely needs mentioning; A barely developed cardboard cutcoat human being gets transported into a typical western fantasy RPG setting with guilds, dungeons and a leveling system which serves as a lazy shortcut to let the audience how strong the characters within the setting are. To it's credit, Lucien, the main character, avoids the usual genre cliche of having an overpowered combat skill that let's him overcome every challenge with little difficulty. He does however fall into the convention of being a faily uninteresting character with little to distinguish him from other characters, other than his apparent masochist attitude towards physical training that the show milks for comedy at every opportunity.
The actual plot of the show itself blends in with the rest of the isekai genre as well.The most interesting thing the show does with its world is the contrast between Luciel's selfless attitude towards helping others with healing magic with how other healers in society have formed a cartel to profit off the need by adventurers to access healing magic. Had that been the core of the show, it would've at least helped distinguish Seija Musou from other shows. Instead, most of it is focused on Luciel undergoing physical training in order to actually be able to fight, an arc which takes up a good chunk of the show's runtime and leaves many of the potentially more interesting elements by the wayside.
Ultimately this is another forgettable show that does nothing particulary well or particularly bad.
