Kaleido Stella

Kaleido Stella is a non-adult science fiction visual novel which follows Manako Hoshimi, a maladjusted but otherwise ordinary high school student who is dreading returning to school at the end of the summer break. Manako is minding his business one day when a UFO crashes nearby and an alien named Idea emerges. The alien, who has the appearance of a human girl with long blue hair, claims that not only has she come to prevent the destruction of Earth from happening in exactly one week, but that Manako is the only one who can stop it. With the fate of the world hanging in the balance, Manako must conquer his fears of adolescence to embrace his destiny.

The player's decisions at key moments determine the outcome of the story. The game features voice acting for all significant characters except the protagonist.