お姉ちゃんだけど弟の部屋を勝手に掃除するねっ is a free adventure game for Android developed by Team Moko App. In this game, players take on the role of a determined older sister who can't stand the mess in her younger brother's room. Seizing the opportunity when he's not around, she decides to clean up the room. As she goes about her task, she makes various discoveries that progress the game.

The gameplay involves touching objects of interest and making choices to advance, but be careful not to get caught by the brother or make the wrong choices, as it can lead to a game over. This game combines puzzle-solving and escape game elements with a beautiful girl romance adventure theme.

Whether you're a fan of sister-focused games or someone who has never tried one before, this app allows you to experience the wonderful world of having a sister. It's a great app for those new to simulation games or dating games, as it is free to play and offers a nurturing and enjoyable experience.