Growing up Rin Kagamine and (Your Name) (Last Name) were best friends. Little did (Your Name) know that (he/she/they) wasn't the only one, because Rin has a magic mirror that serves as a window to another dimension. Rin would become close to her counterpart, a boy named Len Kagamine. Rin would be able to keep it a secret from (Your Name) until one day when the two friends are in high school, and Len really wanted to speak to his counterpart, but sees (Your Name) instead. How will (Your Name) take this new information? Will Len be content staying in his world with (his/her/their) counter part? Will the two meet in person, or only through the mirror?