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.
佐野玲於
as Natsuki Hashiba
中川大志
as Tomoya Matsunaga
高杉真宙
as Tsuyoshi Naoe
横浜流星
as Keiichi Katakura
吉川愛
as Anna Kobayakawa
恒松祐里
as Mari Tsutsui
堀田真由
as Yukiko Asai
坂東希
as Reiko Chiba
山田裕貴
as Masaomi Tsutsui
滝藤賢一
as Tabuchi
田山由起
as
