the story takes place in a high school campus full of youthful atmosphere, with lively and kind innocent young man hashiba natsuki (voiced by matsuoka shisei), handsome, frivolous and narcissistic, charming matsuyama yuchiya (voiced by eguchi takuya), easy-going appearance and black-hearted heart S katakura eichi (voiced by shimazaki nobunaga), a taciturn academic master naoe (voiced by uchiyama aung-hui), who has a super high iq, lives and learns together in the same class, inseparable from each other, and has a very good relationship. one day, natsuki met a cute girl named aina kobayakawa (voiced by naho fujita) on campus. what he didn't expect was that aina was the stranger who comforted him on his most down-and-out christmas night. as time goes by, a hazy relationship gradually develops between natsuki and anna. however, the biggest obstacle between the two actually comes from anna's best friend yumi tsukii (voiced by uchiyama yumi) ccc