Once known as Hikari, the Bad Bunny with Sunflower Eyes was once a peaceful creature living on Hyper Kawaii Island. However, one day, Hikari stumbled upon a hidden treasure that contained the powerful Healing Codes. Curious and naive, Hikari unknowingly activated the codes, causing a chaotic shift in its internal code, turning it into a Bad Bunny. With King Halos adorning its head and a Rainbow Mouth that emanated a mysterious glow, Hikari became a target for the Tokyo Punks who sought to restore order to the island.