Say, 'I Love You' volume 10 features story and art by Kanae Hazuki.

Mei and Yamato prepare for their second Christmas as a couple. The year before, a cold had got Mei down, but this year she's determined to go all out, and the two plan a party at Yamato's for all their friends. A gathering this size would've been unimaginable to Mei just a few years before! When the day finally arrives, she begins to worry... has Mei bitten off more Christmas cake than she can chew?