The first series, "The Nightmare Begins", is a set of 25 stories about a businessman arriving at the hotel after taking a train home from work. He encounters the mysterious owner of the hotel, an old mouse known as Gregory, who suggests that he stay awhile in Room 205. Gregory gradually erodes away his individuality, denouncing the first guest as nothing more than a small part of himself. The man soon becomes drawn into a bizarre series of events taking place within Gregory House as he tries desperately to escape from this purgatory. Though he escapes back to his wife and son, he finds reality too boring, and returns voluntarily. It is heavily implied that he becomes an empty shell, Haniwa Salaryman.