Tell the truth after the kiss

The courtship of a good-looking boy who is secretive is unstoppable!? Gender-switched love! Karen, who made her high school debut, is enjoying a fun high school life with her flashy friends and older boyfriend. One day, when she is about to go on a date, she is stopped by Hino, a shy boy in her class. ``Do you really want to go?'' Karen is confused by Hino's question, but then a car crashes into her...? Karen and Hino have switched places, how can they get back together?