When Will Ayumu Make His Move? manga volume 15 features story and art by Soichiro Yamamoto.

With Christmas and the New Year approaching, the weather might be cooling down, but things between Urushi and Ayumu are only heating up. When Urushi ends up catching a cold amidst the seasonal fun and frolic, Ayumu is there to keep her company and nurse her back to health using a tried and true method.