On a cold December night, Yuichiro Amane runs away from his home only to encounter fate by meeting tea master, Mikaela Hyakuya. The compassionate Mikaela offers Yuichiro a cup of hot tea and a place to stay. Throughout December, Mikaela makes a promise to help Yuichiro overcome his family issues and to be happy. Little does Yuichiro know that Mikaela is planning a surprise for him.