As someone who has Kamen Rider 555 as favorite series, i have to give this my utmost thumbs up. Although the manga offers nothing new, since it's just a rewrite of the Kaixa Gear Arc, it offers a completely different perspective to what is seen in the show , and you can't just look at Masato as being the character with a questionable morality he is in the main series, here he is indeed a hero, or at least an anti-hero. If you never watched Faiz, it might be even misleading when it comes to the character of Kusaka, but this is made as a salute tofans of the series, and it does the job well.