Itsuwari Ω to Hakoniwa no Himegoto

Shia, the palace gardener, is a foreigner hated in the Shen Empire. He’s put in charge of First Prince Yilin’s garden — a prince who’s rumored to dislike people — and ends up unexpectedly meeting the man who once saved his life. Yilin was the one who rescued young Shia when he drifted into this country, the person Shia had always wanted to see again.

Though once expected to be the “Blesser,” Yilin now lives in seclusion. Drawn to his quiet, hard-to-understand kindness, Shia pledges his loyalty to him. One day, however, Yilin accidentally tastes Shia’s blood—and for some reason, it sends him into heat. He confesses that he is, in fact, a cursed “Tempter”, and to keep it a secret, he orders Shia to take him…

(Source: Shinkosha, translated)

Note: Includes one extra chapter.