[Rose-tiara]お姉ちゃんメイドのご奉仕タイム Onee-chan Maid no Gohoushi Time

"You're my maid from today...." Hiroshi has an older sister, Mai. She is smart and good at sports. Also, she is beautiful. He can never resist her.... One day, their parents have gone abroad to travel around. Hiroshi and Mai decide to have a battle and a loser will do all housework. Even Hiroshi thinks that he will lose, but he luckily wins...