Slightly above average, but just that. Don't get me wrong, I enjoyed reading this and it's worth the time. The following text will make it sound as if I hate this manga, but there are good parts too, I just wanted to mention things I dislike since so many people just mention the positive ones. So... Read some other reviews if you want positive stuff about this manga, I'm not going to mention the things I liked and this is going to be long and might be somewhat redundant at times.
Crappy ending though. I also don't find his constant "fake strength" to be appealing, I mean... He gets beaten up left and right and wins by mainly using luck in combination with his good battle senses. I got sick of the whole "hide your powers" and the opposite version "hide the fact that you don't have the powers you should have" premise a long time ago. He's not completely stupid but he's extremely immature and hotheaded, but I didn't expect anything more from a shounen manga. It still bothers me that his sister can whoop his ass ridiculously easily and that he only got his good battle senses after being beaten up by his sister for training or whatever. I mean, that was the biggest redeeming trait of this guy, his unusual and ridiculous battle senses/power when excluding magic, yet he gets his ass kicked without being able to fight back at all, against a girl without magic and a severely underdeveloped body at that... And that's when she's only using half her strength according to later chapters. Come on, what is she? A freaking xianxia martial artist or something? Does she cultivate the dao? Because her power is impossible for a human, and she's a midget with a severely underdeveloped body at that, her strength should barely be above a child. At least give us a reason for her ridiculous power. But nah, she just exists as a comedic relief character that is unreasonable and abuses the mc, a template one at that. Damn I hate her in this manga. If it was another manga/anime/novel, her character type could be used in a good way and I'd like it, but there's nothing I'm more tired of than characters that excessively abuse the mc in the name of comedy and are stronger than the mc just for the sake of comedy, no matter how unreasonable it is.
His sister is also one of the character stereotypes that I despise, I don't mind her being a loli, but her personality is horrible and I've seen it far too many times, abusive, violent, doesn't really care that much about those close to her such as family or friends, as seen when she was supposed to help deliver his entrance booklet that was required to join the school and she saw some band or something that she liked and instead of delivering the booklet that was required to pass and that he needed, she chose to get an autograph and handshake from that band while going "kyaa" and also used that booklet as autograph paper, even better the last page was used which resulted his entrance exam failing... So clearly her own flesh and blood and his future is less important than a worthless autograph from some gay pretentious punks. That brings us the next thing I hate even more about her, her fangirl personality that goes "kyaa kyaa" over idols and gets heart shaped eyes(literally) when meeting them, she's also one of those disgusting types that sees a hot guy and starts trying to cling to him with her heart shaped eyes and girly screams. The type that only cares about exterior appearances in order to start squealing like a pig. Tsk. I hate fangirls that squeal over idols or "hot guys" like that, I get a severe feeling of repugnance when I see them, that's one thing that I would hate no matter which manga/anime/novel she was put into. I mean, learn to have some fcking dignity as a human being... It's okay to like them, but that exaggeration...
Actually, you know what would've been great and really funny? If the author made his sister into a tall muscle monster that can hardly be called a woman, the type that has so pecs so overdeveloped that it can no longer be called boobs. Then it'd be reasonable that she'd beat the mc up and her personality would be pretty amusing, you know, super desperate because no one would take her and the sight of a muscle mountain squealing would be really amusing, the reactions by the people she's interacting with would also be way more amusing as compared to the running "kindergarten child" and "overpowered/unreasonable retaliation" gag that is just not funny, because we see that gag in almost every shounen novel/manga/anime that has an edgy and abusive tsundere in it.
Well, she hardly shows up at all since she's just an outsider, but she's far from the only character with a crappy personality that makes me hate them, hell, most of the people have shitty personalities that makes me wish I could punch them straight. This author is NOT good at making the personalities of the side characters, or perhaps I just hate the types of personalities he prefers. I mean, it's possible to make "enemy type" characters somewhat interesting and likable, especially since this is a comedy manga and was never anything in terms of action, story or drama, so why not do it? Every "enemy" character introduced thus far has been generally detestable and annoying, the kind you either want to show their place by beating their teeth out and turning them meek and timid or that you want to outright torture to death, both works. It's fine to make characters like that in serious novels, manga and anime where we can get the pleasure from seeing them brought down to earth or killed off in gruesome ways which is utterly satisfying, but something like that would never happen here so introducing such disgusting people is a very, very bad choice.
He also gets pushed around by pretty much everyone, losing and getting beaten up all the time for "comedy". I guess that's what you get when he only possess fake power. Though... around volume 7 his power starts to raise a bit and then he got an additional ability at volume 10, but we never actually see him properly use his power against enemies because he's not allowed to show his "special card" power, at the very end he pretty much just stepped on the starting line when it comes to power. It ends when he's supposed to properly train and become strong, so it feels like it got axed or that the mangaka got bored. A sequel might be nice that starts when he comes back and has trained and now has real power... Sigh.
I also didn't like the power system in this manga. Feels way too flimsy and ephemeral/temporary. It seems like their power is just temporary, we also hardly get any proper explanation of the magic and everything seems to be relying on cards, it seems that a better card = more magic power and more spells, that they can't improve themselves and have to rely on external items... Also seems that it's almost impossible to use magic anywhere but at the hotspots all over the world(magic is impossible without the magic waves at the hotspots and even if they can use it they need the help of an item in order to use a single spell, kinda like a storage device, their cards that is and then they can only use one spell and a down-leveled one at that, so the magic knowledge is worthless outside and even inside a plate is required to use magic). I prefer something permanent that doesn't rely on a certain place or item, otherwise it feels like those vrmmorpg novels, they might be super powerful but as soon as they leave the game world, they're pretty much just an average joe, that's also one of the main reasons that I hate it when the mc goes back to their own world after defeating the demon king(losing his/her power and uniqueness and privileges) or whatever they do over there in the novels where the mc gets transferred to another world. Well, the setting and story are both completely horrible, but I never care much about that when reading stuff that focus on comedy, because I'm not even here to read a good plot, just to have a good laugh... It just bothers me that it couldn't have been a little bit better and not so riddled with holes everywhere. It feels as if the author went "wouldn't this be cool?" then implemented it without thinking about it and then never bothered to properly work stuff out and just left it as is, and that is probably what actually happened.
Anyway, worth a read but my main gripe with this story is his lack of actual power and reliance on luck along with him getting pushed around too much in the name of comedy. He's not a character should be pushed around if we look at his personality, yet the author does it because he thinks it's extremely amusing when the mc is abused despite having a fiery personality. There are some manga, anime and novels where the mc are made to be pushed around with a no-balls and timid personality, and then it feels natural and somewhat acceptable, but not in this case when everyone thinks he's super powerful yet still abuses him.