「お姉様ばかりずるいわ！」と言って私の物を奪っていく妹と、「お姉さんなんだから我慢しなさい！」が口癖の両親がお祖父様の逆鱗に触れ破滅しました (Associated Names)

My younger sister always says, “You’re the only one who’s cheating!” and steals my things. My birthday present, my grandfather’s souvenir when he went abroad, the fountain pen I got when I passed the first place at school… all of them were stolen by my sister. My parents only love my little sister and scold…