妹☆らぶみー!! ～お兄なんかぜんぜん好きじゃないんだからねっ!!～

One summer my parents had a situation. I was asked to take care of my little sister at our beach house.
She was cute to look at but when she opened her mouth she was pure garbage.
With big worries and small hopes for my own fun, I began the bizarre summer vacation...

[From DLsite English]