Mukuchina Koushaku Reijou to Reitetsuna KouteiMukuchina Koushaku Reijou to Reitetsuna Koutei , Mukuchina Koushaku Reijou to Reitetsuna Koutei ~Zense Hirotta Kodomo ga Koutei ni Natte Imashita~ , 無口な公爵令嬢と冷徹な皇帝～前世拾った子供が皇帝になっていました～ , 無口な公爵令嬢と冷徹な皇帝 , The Silent Daughter of a Duke and the Cold Emperor ~ The Child I Found in My Past Life Became the Emperor ~ , The Silent Daughter of a Duke and the Cold Emperor , The Reserved Daughter of a Duke and the Cold-Headed Emperor – The Child I Picked up in My Past Life Had Become an Emperor , The Reserved Daughter of a Duke and the Cold-Headed Emperor