Join the enchanting journey of the three sisters Ai, Mai, and Mii, alongside their android maid Mea and mischievous pet ferret Unagi, as they embark on a whimsical adventure through time and space without ever departing from their cherished mansion. Driven by enigmatic clues from the mystical 'Popotan,' the girls pursue answers to their deepest questions while indulging in detours, forging new friendships, enjoying relaxing hot springs, and even managing their Christmas shop within the confines of their home. However, amidst the laughter and joy, their ultimate fate unfolds with unexpected twists, reminding them that time travel demands farewells to dear companions along the way.