Terrible Summoner (Viper V-1) (Viper)

Terrible Summoner (Viper V-1) (Viper) is a doujinshi starring Carrera from Viper Gts, by Nishitsuki Tsutomu and available in english.

From here you can explore more Viper Gts content, other entries featuring Carrera and more works by Nishitsuki Tsutomu.