In another world, my sister stole my name. Volume 1

Through a handheld mirror connected to another world, college student Ichika shares a friendship with a boy named Cecil--one that only her older sister, Karen, knows about. When Karen and the mirror disappear one day, Ichika is devastated. But grief turns to shock a year later when she, too, is sent to the world on the other side, only to find her lost sister and a grown-up Cecil! Except … why are her sister's first words to her "I've missed you,...