This cube craft paper toy is the G., based on the anime and manga series Katekyo Hitman Reborn. This paper craft model is designed by blackignus. G. is Giotto's childhood friend. They created a vigilante group that soon became the core of the Vongola Famiglia. He was the first generation Vongola Storm Guardian and thus, like all other first generation guardian, physically resembles his Tenth Generation Counterpart - Gokudera. The only differentiation he has from Gokudera is the tattoo on the right side of his face and the red coloured hair, much like his Flame Colour.
Reborn, known as Katekyo Hitman Reborn in Japan, which roughly translates to "Home Tutor Hitman Reborn!", is authored and illustrated by Akira Amano and published in Weekly Shōnen Jump in Japan. In the USA, it was published and licensed by Viz Media, stopping its serialization at volume 17. There are currently 203 episodes and 39 volumes released in Japan.
You can download this cube paper toy from here: Katekyo Hitman Reborn - G. Cube Craft Free Paper Toy Download