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!

Excited to have plans on Christmas Eve, Natsuki feels like he's finally catching up to his friends who are in relationships. But when the night doesn't go as expected, the stage is set for falling in love.