Honkai: Star Rail: My Sister Herta Turned into an Airhead, So I Have to Spoil Her

【Honkai: Star Rail + fanfiction + multiple female leads + Genshin Impact + System + doting on his little sister + lighthearted comedy】 He transmigrates into Honkai: Star Rail and becomes the genius Herta’s... older brother? Baita thought he had the best possible start, but then he discovered that this world had gone crazy! The aloof Herta has become a hopelessly dumb girl who can only count on her fingers and even needs her brother to do up her buttons. The wealthy Asta has become a stingy miser who chases him for three blocks over five bucks. Stellaron Hunter Kafka is a severe social phobe who drops to her knees and apologizes in terror if anyone so much as looks at her. Even Ganyu, just passing by, is a lazy bum who lies on the ground pretending to be dead! Faced with these “useless” girls, who have nothing going for them but their looks, Baita awakens the **All-Powerful Big Brother System**. “I guess it’s up to the only normal person here to save the world.” And so, everything takes a sudden turn: The Doomsday Beast is right on top of them? Baita cradles his little sister in one arm and slaps it flying with the other. “Keep it down, I’m feeding my sister!” An Aeon descends? Baita points ahead. “Sis, that glowing big guy looks like a potato chip. Go bite it!” Herta: “Nom! Big brother is the best!”