A heartfelt desire is poured into this limited span of one day—to devote oneself entirely to Ruri Narumiya from morning to night. Throughout this time, bold actions are demanded in every possible situation, whether during meals or in the bath. The evolving relationship with Ruri gradually deepens, drawing attention to its progression. Her reactions are expected to shift as the story unfolds. This work promises a dramatic narrative centered on unwavering affection and determination within the constraints of time.