These four friends couldn't be more different: Natsuki Hashiba, a dreamer who longs for love, Tomoya Matsunaga, a self-centered playboy, Keiichi Katakura, a winsome guy with a hidden saucy streak, and Tsuyoshi Naoe, a socially awkward nerd who loves anime, manga, and games. Together their high school days are as vibrant as rainbows!

Relationships progress as everyone sets off on an overnight trip to an amusement park. Natsuki and Anna find themselves alone together in a rising Ferris wheel cabin...!