在这部Happiness Charge 光之美少女！动画片中,在“幻影帝国”的猛烈进攻中的地球，光之美少女是世人共识的存在，人们不时从新闻中解了各小队所属的国家战斗。成为了‘最坏兽’攻击目标的“蓝天王国”公主----白雪 姬，在一次侵略之中逃到日本，在逃亡的过程中遇见了地球的守护神“蔚蓝”。蔚蓝赐予她成为光之美少女的使命，不过孤僻的小姬对于这份使命感到极为恐惧，于是她选择了逃避。蔚蓝于是再给予小姬一份称为“爱的结晶”的力量，让她能够寻找命运中的同伴。怕生的小姬真心想交到朋友，却不知道如何运用结晶，结果只想着“这个砸到的人就是我的朋友!”就把它丢了出去。就这样，「爱的结晶」砸中了人生中第一个朋友与伙伴－－爱乃 惠。
The ruler of the evil Phantom Empire, Queen Mirage, begins her invasion on Earth using an army of Choiarks and powerful monsters called Saiarks. All across the world, Pretty Cures are dispatched to fight against the Phantom Empire threat. Hime Shirayuki, a princess from the Blue Sky Kingdom, which was taken over by the Phantom Empire, joins the fight as a Pretty Cure named Cure Princess, but always finds herself running away scared. Given a Crystal of Love by the Spirit of Earth, Blue, and told to seek out a partner to fight alongside her, Hime goes to the city of Pikarigaoka and randomly throws the crystal in the air, deciding to partner up with whoever it lands upon. This person turns out to be Megumi Aino, a kind-hearted girl always looking to help others, who is recruited by Hime to fight by her side as Cure Lovely. Using the power of the Pretty Cards and their changing forms, alongside Cure Honey and Cure Fortune, they form the Happiness Charge Pretty Cure team as they are given the task to collect all of the Pretty Cards and protect the Earth against the Phantom Empire.
