On Day 2539, Rin awakens solo once more, her recollections hazy and no communication from fellow humans. Despite this, boredom is not a concern as she holds a tablet, endowed with the power to bring her heart's desires to life. With each passing day, Rin weaves together delightful realms, one utopia at a time, as a refuge from her solitude. Her ultimate aspiration is to uncover the enigma surrounding her existence.