The plot is about a kid thats been raised to beat satan so what does satan do to counter that? he sends him a waifu to weaken him... The art is great, theres nothing negative i have to say about it the christianity depiction might be a little weird but if you dont pay it much attention its a great manga, the characters all have a reason they are there and not just because, the character interactions and dynamics are increadible, the villains are great, if you can ignore some of the staff you will definetely enjoy this a lot