This is the debut title for Mignonne. Itsuki occasionally has dreams about a lover from his past life, Suou-hime. One morning in homeroom, a new transfer student named Rin who looks just like her appeared in front of his very eyes and he embraced her, happy that he finally met her again. “What are you suddenly hugging me for… What’s wrong with you?” Well, it’s natural that he would get hit after that doing that to someone who he met for the first time. However, that isn’t what shocked him the most. It was that the cute Suou-hime that he knew was now a tomboy. Meanwhile, her twin older sister Yui, his osananajimi Kuu and the rest of the class watched dumbfoundedly.