World's Greatest First Love manga volume 17 features story and art by Shungiku Nakamura.

Manga editor Ritsu Onodera feels like his job at Marukawa Publishing's Emerald shojo magazine is going to drive him nuts when his boss—and first love!—Masamune Takano gives him special “homework.” He's assigned to a brand-new manga creator making her debut, and taking this as a sign of Takano's faith in him as an editor, Ritsu gets excited for his new project. But as soon as this new creator finds out Takano isn't her editor, she looks clearly disappointed! Meanwhile, Ritsu extracts a promise from Takano for no kissing and no sex until he properly confesses his love for him. Takano (barely) keeps it, but he relentlessly teases Ritsu until Ritsu starts feeling the effects of intense sexual frustration.