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!

The overnight trip to the amusement park has brought Tomoya and Mari closer together. Tomoya is hoping to take the next step with Mari as the school sports tournament heats up, but when she catches him in a compromising situation, things start to go sideways. Meanwhile, Natsuki prepares for a Christmas Eve date with Anna...!