First of all, this movie contains A LOT of cursing, provocative/improper lines, violent scenes (not that violent, but still violent), & satanic symbols. Definitely not recommended for kids, and for those who doesn't comfortable with those things. I found myself couldn't enjoy this to the fullest because of the quite huge amount of those factors (esp the cursing). But that's apart, it's actually a good movie. In short, this movie was a mixture of a bunch of crazy comedy, full music (both death metal & sweet easy listening), minor romance as background plot, and a bit drama. What makes this movie standout was its crazy comedy (the comedy was not as much as I expected, but when it came, most of the time, I laughed out aloud literally) and most of all, Matsuyama's acting. He was very convincing as both the goofy, sweet, pure yet nerd-looking (and somewhat kinda girly!) Negishi and as the tough plus scary death metal band's vocalist, Krauser (Negishi's stage name). Awesome! Before I watch this, I couldn't imagine him potraying a comical role, but he did it here brilliantly. --Detailed review: Story: 9 - As you'd expected from manga-based movies, the story was very refreshing and original. But there were some missing link at character development part. Ok, Negishi was trapped into a death metal band, but how he could act *that* well and natural as a tough & such a violent speaker like a real death metal band vocalist (while he's still the pure & innocent Negishi at back stage) was a mystery (they did show the reason at the middle part of the movie, but Krauser has been a very violent speaker from the start). In addition, I think Negishi's band partners should got more screentime since they're such interesting characters. But again, it can't be help, since this show is a movie, and was all about Negishi. It would need a series to properly deal with other characters. Acting: 9 - With his semi-double roles, Matsuyama was without doubt, the star of the show. Perhaps 75%-85% of the movie relayed on his acting, and he used it to showed his skill to the fullest. Excellent. The rest of the cast did a good job. I don't fancy the manager's acting, but I do like the actress & actor of Aikawa (the girl) and Wada (the enthusiast Negishi's band partner). They did their part nicely. I also feel the need to credit a couple of notable minor supporting roles as well (some of Krauser's die hard fans). They were simply funny! Music: 8 - Here you'll found 2 types of completely different music: sweet-happy easy-listening pop (which is Negishi's true interest) and death metal music (which Negishi despises heartily, but forced to perform). By nature, if you like one of the said genre, most likely you'd despise the other one, rite? So, just bear with what you don't like, because both of them had almost equal "screentime" :D (the death metal one was quite dominating though) Directing & editing: 7.5 - Like what I've said before, there were some missing link in the story. You'd still get the whole idea, but it could be better. Rewatch value: 6.8 - I probably will rewatch this to watch the hilarious scenes. ----- Conclusion: if you're fine with movies with cursing (almost) all of the time, quite violent scenes (visually & verbally), and some satanic symbol, and if you're in the mood for something crazy & funny (but not that flat, it was actually quite emotional at times), this is for you.