The Case of Takafumi Yokozawa (世界一初恋 ~横澤隆史の場合~, Sekai-ichi Hatsukoi: Yokozawa Takafumi no Baai) is a light novel written by Fujisaki Miyako and Shungiku Nakamura.
A long-time friend of Masamune Takano, Takafumi Yokozawa felt it was only natural that he developed feelings for him. The two had attended college together, and even ended up working in the same company following Yokozawa's invite. Having had to take care of Takano during a particularly low point in his life, Yokozawa developed feelings for him which were not reciprocated.
Following a drunken night spent in a bar trying to forget about Takano's rejection, Yokozawa wakes up in a stranger's house. This stranger turns out to be head of the Shounen department at Marukawa Publishing, Zen Kirishima. After learning that Kirishima paid his bar tab that night, Yokozawa ends up as the unwilling 'servant' for the man.