Sweat and Soap Vol. 4 (Kodansha, 2020)

Kotaro and Asako are back from their first trip together, a romantic getaway to Hokkaido. But when Asako returns to the office, her anxiety comes back, too, because it's time to let their secret out and reveal their relationship to their coworkers. Kotaro sets up a lunch to introduce Asako to his teammates in product development. But this is a far cry from the accounting department, and Kotaro's coworkers all seem fashionable, ambitious, cool-on a whole different level! Suddenly, those moments spent soaking in the hot spring bath seem so far away!