Awkward and insecure student Karin Karino experiences the bumpy ride of first love in this touching drama set against a backdrop of high school life. Living happily ever after isn't on the curriculum, and Karin soon finds herself the center of popular boy Kiriya's attention, as well as the bull's eye in embittered classmate Yuka's dartboard of hate. Karin and her friends begin preparations for their trip to Okinawa, and Kiriya's past slowly unravels after his father forbids him to go on the trip. Karin and Kiriya's relationship blossoms, but intimacy rises to the surface of their turbulent sea of young love as the pressure to give in torments romance newbie Karin.