The Duke's Teddy Bear
https://www.webtoons.com/en/romance/the-dukes-teddy-bear/list?title_no=5045 10 Cry15 Astral/Spirit Body/ies Based on a Web Novel Birth Secrets Body Swap/s Brother-Sister Relationship Cold Male Lead Coma Doll/s Doting Family Member/s Duke Male Lead European Ambience Fantasy World Female Protagonist Full Color Ghost/s Handsome Male Lead High Fantasy Illegitimate Child/ren Knight/s Long-Haired Male Lead Magic Nobility/Aristocracy Noble Girl Possession Red-Eyed Female Lead Red-Haired Character/s Red-Haired Female Lead Red-Haired Protagonist Secret Ability Secret Heir Special Ability/ies Spirit/s Stepbrother/s Strong Male Lead Swordsman Tragic Accident/s Trapped in Item Unique Ability/ies Webtoon White/Silver-Haired Character/s White/Silver-Haired Male Lead
Hengoku no Calendula