(from ebookjapan):
Santaro Tsubaki is a high school student at Joto Academy. He is the president of the Cinema Study Group, which produces a special effects film about a fictional superhero named Green Glass. However, one day, suspicious accidents start happening around him. Every time Santaro faints, the real Green Glass appears and saves him from danger. Santaro wonders if he has the potential to be a hero. Santaro and his best friend start an investigation to find out the identity of Green Glass and the mastermind behind the accidents.......?