My father remarried. I finally had a new little sister-in-law, and I fell in love with her at first sight. This is what I, Takuro Matsubara, said at our first meeting. I will look at her – Toko Konoe – with a s*xual gaze. But for some reason, the sister-in-law’s first impression seemed to be the worst, and our life together began with an ∞ rating. Besides, I’m a little shy… What does “a little” mean about me? “You push me down, touch my breasts and look at my underwear every day! “I’m sorry, little sister. I didn’t do it on purpose.” Now that we’ve made a contract, I need some time to get to know the real me… The hero got pushed by the heroine, and the heroine blushed all over the place! A 100% brother-sister love comedy with a smile that won’t stop smiling!