There's a truthful degree of fan service although it will feel tame to any one who has watched the likes of 'Strike Witches', Elfen Lied' or 'Ikki Tousen'. Similarly the extent of violence can be bigger than most western animation but is tame in comparison with quite a few https://monobookmarks.com/story19952458/helping-the-others-realize-the-advantages-of-edens-zero