As much as I love Yamazaki Kento, I think that he wasn't really suited for this cheerful, happy-go-lucky character. Rather than him, I think someone like Chiba Yudai would play this part better. Other than that, I don't see many flaws. The story is quite different from the anime, but not more than expected. After all, it's pretty hard to copy a story exactly as is. There's nothing wrong with the soundtrack, and I loved the fact that they added the OP song of the anime