Christmas season. Hasegawa Yūta found himself single after breaking up last month when his girlfriend had cheated on him. And it was only a few days until Christmas! After an everyday conversation with his female friend, Mino Ayaka, Yūta met a beautiful girl clad in a Santa suit—In a lane full of couples no less! Her name was Shinohara Mayu. Will this encounter with Shinohara turn out to be the Christmas present for Yūta ?