As the final year unfolds, the six classmates gather to share their uncertainties about life after graduation, stirring up hidden affections and rivalries. Yuuichi wrestles with protective instincts toward his sister Nagisa amid growing tensions with the others, while Takidani and Abiko find themselves drawn into subtle exchanges with Kanami and Youko. These candid talks heighten the emotional undercurrents, prompting each to question where their hearts truly belong.