Tada, Soredake de Yokatta ndesu

is a Japanese light novel series written by Hoshisan Ryoya Matsumura, with illustrations by Miho Takeoka. The series began publication on February 10, 2016 by ASCII Media Works under their Dengeki Bunko publishing imprint.

The series won the Grand Prize in the 22nd Dengeki Novel Prize.

Synopsis
A boy student K committed suicide at a junior high school. "Taku Sugawara is a devil. No one should believe his words. "

It is said that the background of the suicide was a fierce bullying to four students including K by Taku Sugawara, a "devilish junior high school student". However, K is a popular genius boy, and Taku Sugawara is a sober student at the bottom of the school clique. And no one witnessed the bullying. Many mysteries remained, including no evidence of their contact. Why did the genius boy K have to commit suicide?

"The revolution is going on. Please ridicule me. Tell me the story of my merciless and tiny revolution--"

When Taku Sugawara, a boy called the devil, begins to tell the story, no one can expect it. The astonishing truth that wasn't there emerges.

Overwhelming shock, impression that can not be escaped. A shocking work that shook all readers and shined at the top of 4,580 works.