Stuck at Home with My Sister: Prologue

What happens if you're stuck at home with your pretty sister? Crazy talk, conspiracy theories, random encounters. The playful mood never leaves our heroes. A small kinetic visual novel about a geek brother and a beautiful sister who find themselves locked at home alone with each other after a long separation.

Yuki and Yamato were separated in childhood, but by chance they met again. Will they be able to find a common language? Can they get along? Or will the years of separation prevent them from becoming close again? And what is the reason for their imprisonment?