I Tried Having My Shut-in Stepsister Use a Dating App. - Karin Kitaoka

Karin is a reclusive younger stepsister with a stepbrother complex. Worried about her future, her stepbrother, thinking of her best interests, suggests she try interacting with others on a dating app. Karin mustered the courage to meet a man, but unfortunately, she got taken advantage of by a scumbag. Her stepbrother, unable to bear seeing his precious stepsister hurt, swore he would never let her go again, and the two comforted each other as if to reaffirm their bond.