The plot centers around the Kirameki Powers, a duo who protect the world from the Makkura Empire, with the help of those from the Kirapawa Kingdom. The series celebrates the franchise's 5th anniversary.

Before Kirari becomes the main character, she one day encounters Himenyan who jumps out of a game console. In reality, Himenyan is the princess of Kirapawa Kingdom that is from a popular sword and magic game "Kiramori". Afraid of the enemy Makkulala, she ran away. However, the Makkura Empire chase after her getting her into big trouble. The "bibitto" Kirari becomes friends (bittomo) with Himenyan and transforms into the "Heroine of the Sun, Kirapawa Sunny" where she fights against the Makkura Empire. Finding reassuring friends, gathering precious Kirapawa Memories, they'll win over the battle against strong enemies. Finally, defeating the Dark Witch Makkulala and protecting the world.

5th grade elementary school student, Kirari Momose, encounters a fairy who jumps out of a game console. The fairy, Himenyan, is actually the Princess of the Kirapawa Kingdom, a kingdom located in a popular sword and magic game "Kirapawa Morimori Adventure". The Princess, who was afraid of the enemy, ran away but was chased by those from the Makkura Empire. Becoming friends with Kirari, Kirari transforms into the "Heroine of the Sun, Kirapawa Sunny" where she fights the Makkura Empire. Joining with Yuzuki Shimori, Honoka Akashiro and Koyuki Aoba along the way, the four collect the Kirapawa Memories in order to win against the Witch of Darkness, Makkulala.