44th Period 'Roasted Sweet Potato' / 45th Period 'Grinding Noises' / 46th Period 'Lottery' / 47th Period 'Munch Munch' / 48th Period 'Merry Christmas'.Yüki, Kazumi, Megumi, Natsumi, and Chika arrive at a store selling roasted sweet potatoes while walking down the street on a cold breezy day. Ryöta, Köji, and Tsubasa's sudden appearance interrupts the girls' silent competition over a quintet of sweet potatoes spanning a spectrum of different sizes. During school, it begins to snow. While waiting for the snow to accumulate, the students of Class 5-2 become involved in a debate over the meaning of a childhood nursery causing them to be the last outside. Later in town, Ryöta, Kazumi, test their luck at the district lottery. After home economics class, Yuki tells Natsumi that chalk is edible. Chika stops her just in time and decides to see if Ryöta would fall for the lie. Ryouta poorly handles the deception by lashing out at Chika's cooking to his regret. Fortunately after a few days, Ryouta manages to win Chika's forgiveness by kissing her.