Wallpaper based on the Guyver anime.
Here is a brief synopsis supplied by The Azure Sky:

"A test type Zoanoid, disguised as a normal man, escapes from an organization called the Chronos Corporation with a bag containing three items called the Guyver Units. Chronos soldiers attempt to recover the units from the test-type but are unsuccessful; the test-type was discovered with a grenade in his possession and used the grenade, killing himself and scattering the Guyver Units around the area. Meanwhile, two young high school students, Shō Fukamachi and Tetsurō Segawa come across one of the lost Guyver Units. Curious as to what the unit is, Shō accidentally activates the unit which then merges with him, becoming "Guyver I." Now, Shō must fight for his life and those that are close to him against Zoanoids sent by the evil Chronos Corporation that are in pursuit for the Guyver."