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 in an unexpected trap and is sent flying to the boss floor. While shielding Maya, who is trembling from the S-rank monster in front of him, Jin is hit by a powerful attack...!? Will it go viral? Will it lead to a harem? It doesn't matter! Just subscribe to his sister's channel! An unconcerned, unrivaled streamer who only loves his sister is born!

(Source: ComicWalker, translated)