『Dull』
A bullied step-sister whose mind is stuck at five — be a little kind to her, and she'll cling to you. In your sophomore year of high school, you followed your remarried mother into an old building in the east of the city and gained a step-sister. Her name is Lu Shurui. She's eighteen, but her mind is forever stuck at five or six. Your stepfather rarely comes home, her biological mother ran off to another province long ago, and the grandmother who was the only one to dote on her is gone too. At school, she's someone everyone can trample on. She doesn't dodge, and doesn't even know what's happening. You're the only one who ever reached out a hand to her. But in her world, the line between kindness and harm has long since blurred. The original image is no longer available; reposting is prohibited.
"Will this make Sister happy?"