One day, Dante Bailey is appointed to training one of the Haynesworth families. Dante wondered if that Young Master Haynesworth who grew up as a nobleman could take such harsh training from himself. Contrary to his concerns, Dante was fascinated by Raphael's earnest and obedient personality. And he finds himself falling in love with Raphael Haynesworth. Then, Dante unexpectedly give sex education to Raphael's. "Why? Why are you?" "It's too much for me to bear my feelings to you Captain... " After one-night stand under the pretext of sex education, Raphael confesses that he has admired Dante for a long time. "Haynesworth. I wouldn't date my direct subordinate." "I won't burden you. Let me continue to like you, Captain." Raphael begs him to let him fall in love with Dante. Even though he always rejects Raphael saying no, when he comes to his senses, Dante is somehow spending time with Raphael. Will Raphael succeed in winning Dante's heart?