Akane, who watches over her younger sister Ringo with strength and gentleness. Ringo, who deeply admires and yearns for her sister from the bottom of her heart. The bond between the two, strong as it is, begins to turn into romantic feelings... Every day, Ringo tries to distract herself from her growing feelings for her sister through self-pleasure. One day, when Akane returns home drunk, Ringo sneaks into her room. Several days later, Ringo listens to Akane's advice on a heartbreak but decides to confess her own feelings.
