Aneboku ~Oneechan wa Bijin 3 Shimai~  

あねぼく～お姉ちゃんは美人3姉妹～

Hiroto doesn't wanna go home... because of his three older sisters.... Two weeks ago, his father suddenly got remarried to a woman who has three daughters. Therefore, he has three older sisters now.... Since his father and new mother are now on honeymoon, there are only him and three older sisters at his house....