The Nogizaka family visits Yüto's house for a Christmas party. However, the party is cut short when Yüto faints since he worked himself to exhaustion to earn money to buy Haruka her Christmas present. Yüto regains consciousness after Maria Yukinohara (the fifth-ranking maid) ministers to him. Haruka declares that she will stay by his side in order to nurse him back to health, under the questionable guidance of a handbook that Mika prepared...