Nijiiro Days follows the colorful lives and romantic relationships of four high school boys—Natsuki Hashiba, a dreamer with delusions of love; Tomoya Matsunaga, a narcissistic playboy who has multiple girlfriends; Keiichi Katakura, a kinky sadist who always carries a whip; and Tsuyoshi Naoe, an otaku who has a cosplaying girlfriend.
Reo Sano
Natsuki Hashiba
Taishi Nakagawa
Tomoya Matsunaga
Mahiro Takasugi
Tsuyoshi Naoe
Ryusei Yokohama
Keiichi Katakura
Ai Yoshikawa
Anna Kobayakawa
Yuri Tsunematsu
Mari Tsutsui
Mayu Hotta
Yukiko Asai
Nozomi Bando
Reiko Chiba
