الحلقة 11: يحتفظ ماكوتو بالمفتاح لسر بيانو جده

11

According to the will of Mr. Kusakabe's former teacher, his granddaughter, Makoto, is the only one who knows the whereabouts of the key to his beloved piano. Can they figure out the secret of the key's location? (Source: Funimation)