Four male friends support each other through the colorful ups and downs of teenage love. 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 gang sets out for their senior trip to Osaka and Kyoto! With Mocchi from the basketball team planning to ask Anna out during the trip, Natsuki decides to reveal his feelings for her too, but can he find the right moment? A white-hot battle of hearts over Anna ensues!