Sweetheart (Enti)

A man who confidently vowed never to love and a woman determined to win her man fall into an unexpected and intense love. Set during the Byeongja year, as Joseon is ravaged by the Qing army, both their fates spiral uncontrollably. Despite their confidence in life, they each prove foolish in love. The question remains: can they find love, or will they even survive the turmoil?

it's 15+, has a kdrama

Original Webtoon:
KakaoPage, Toomics, Naver Series, Lezhin, Blice