Onii-chan ni Amaetagari na Imouto de Gomen ne!

"I love you, onii-chan!" "Sorry, we can't do this." Hinata ardently dotes and fawns over her older step-brother Hayato on a daily basis. However, he told her, "Isn't it high time for you to stop this now?". What will happen to her love life now!? A romantic comedy between a straight-laced older brother and a younger sister with a brother complex!