My younger sister Hirono has just graduated from ● school this year. More innocent than her actual age suggests, with a somewhat childish charm, I gradually found myself developing deep, indescribable feelings for her without even realizing it. Wearing her freshly retired uniform with a confident, still-totally-desirable attitude, Hirono began to steadily erode my self-control. Night after night, I started having dreams I knew I shouldn't—dreams featuring Hirono in shockingly bold scenarios. In these dreams, she tempts me in sexy leotards or as a catgirl cosplayer, her allure shining more intensely than ever.