Double Bs and Their Grandpa

Double B--Blakey and Brighty--are bright and mischievous young schoolgirls. They live with Grandpa Evin. Evin is a science-fiction writer with extensive experience in space exploration. But he kept this secret very well until one day, his two naughty granddaughters discovered his secret and accidentally entered Evin''s secret world. They discover that there are so many interesting and incredible c...