Shishimaru (Ninja dog) helps Kenichi and Yumeko from a dog and disappears. So, Hattori catches Shishimaru and brings him home; Hattori makes Kenichi study hard and does not allow him to rest. As Kenichi scores good marks, Ama gifts them both; Kenichi takes Hattori's help and does all the household work. Kenichi surprises his parents on their wedding anniversary with a celebration.