The World's Greatest First Love, Vol. 4 by Shungiku Nakamura

A fresh start turns sour after a manga editor's new boss turns out to be his ill-fated first love!

When Ritsu Onodera changes jobs, looking for a fresh start, he's not exactly thrilled when his new boss turns out to be his old flame. Ritsu's determined to leave all that in the past—but how can he when his boss is just as determined that they have a future?

Ritsu Onodera, an editor in the shojo manga department of Marukawa Publishing, has the worst work environment possible, primarily because it’s run by his former first love, hotshot editor in chief Masamune Takano! To make matters worse, it’s possible that in a recent drunken stupor Ritsu went all the way with his boss. Unfortunately, thanks to an alcohol-induced blackout, he can’t remember! But time waits for no one, so work in the editorial department gears up for the year-end rush, and to add to the craziness, Takano declares that all he wants for his birthday on Christmas Eve is to go on a romantic drive with Ritsu!