Leo, a 28 year old ex-chuuni with no sense of purpose and a forgotten passion for art is fired from his job the same day his girlfriend breaks up with him on a gloomy, rainy day.

When the chance to become a hero presents itself, he takes it... only to be robbed of the moment by his very own creation: the ultra edgy, ultra cringe-worthy Sinful Shadow - the main character of the comic he created in middle school!