Onii-chan Mou Icchatta no?

The little sister who loves teasing big brother punishes him with ecchi-ness, knowing his weakness! "You like it when I stroke you, you're a pervert after all!" She likes to taunt you, but she also truly loves you. The story of an immodest and disobedient imouto and the bad brother who falls for her titillations again and again.