Kenichi and his friends are asked by the owner of a cake shop to take care of the shop. Kenichi and his friends panicked when Shishimaru accidentally ate a half-made decorated cake during the store, so they decided to disguise Shishimaru as a cake instead to survive the situation. Meanwhile, the husband who came back finished the Shishimaru cake without knowing anything and went to deliver it.
ケーキ屋さんのご主人から店番を頼まれたケン一達。店番中、作りかけのデコレーションケーキを誤って獅子丸が食べてしまったことに慌てたケン一達は、代わりに獅子丸をケーキに変装させることでその場をしのぐことに。そんな中、帰ってきたご主人は何も知らずに獅子丸ケーキを仕上げ、配達に行ってしまう。