Hoshi no Samidare tells the story of Yuuhi Amamiya, a seemingly ordinary college student whose life takes an extraordinary turn when he encounters a talking lizard.
He's told that he's now a knight tasked with protecting the world from a powerful mage who threatens its existence with a giant weapon in orbit.
However, things get even more complicated when Yuuhi meets his neighbor, Princess Samidare. She has her own agenda: to destroy the world herself.
Intrigued by her ambition, Yuuhi decides to help Samidare achieve her goal, and becomes her ally in the fight against the mage's forces.
As they battle, Yuuhi begins to find a new sense of purpose, but his past might prevent him from fully embracing his new life.