Imouto no Meikyuu Haishin wo Tetsudatteita Ore ga, Ukkari S-Rank Monster Aite ni Musou Shita Kekka ga Kochira Desu

"Labyrinth Streaming" is a streaming service where players conquer dungeons that have appeared all over the world. At the request of his sister Maya, a labyrinth streamer, Suzuta Jin, a doting older brother, acts as the cameraman and takes pictures of her adorable little sister... but he gets caught...

Source: MyAnimeList