My Servant (Untae)

Alan, the illegitimate son of a count, takes in Rayner, a boy who once wandered the streets with no family, to serve as his attendant. Rayner, grateful to the only person who ever showed him kindness, grows to love Alan and vows to stay by his side forever. But when he learns the shocking news of Alan’s impending marriage, he can’t help but ask, “You said you’d take responsibility for me until the end, didn’t you, my lord?”

Original Webtoon:
Bomtoon, Lezhin

Official Translations:
Thai, T.Chinese
Japanese: Beltoon, Lezhin