https://www.cmoa.jp/title/296135/

Evalina, nicknamed the "Knowledgeable Witch," receives an order from the king to bring the murdered prince back to life. She somehow manages to revive him, but when the prince wakes up, he suddenly becomes aroused!? Apparently, he resurrection spell, which she unconsciously activated, requires sexual intercourse between the prince and Evalina to be completed. Having brought the prince back to life, Evalina cannot let him die, so she spends the night with him, knowing that it will be only be that one night. However, the next day, the prince decides to take responsibility and says he wants to marry her! She refuses with all her might, but he presses her even more vehemently... Is this sudden ordeal a blessing or a curse for the witch? A magical love story between a prince who awakens to love and a kind-hearted witch!