The man in the grimy work clothes was the janitor at Miyu's apartment. Despite seeing him regularly, Miyu had always considered him an 'invisible person.' She only realized this after he told her about it and felt ashamed as a result. This is because Miyu herself had been ostracized by friends since puberty, treated as if she were invisible. A strange and intense day was about to begin for Miyu, who was suddenly assaulted and mistreated, and the grimy middle-aged man…
