My Male Lead is the Dark-Haired Northern Duke

[The Male Lead who is abandoned by the female lead is pitiful, so I raised him into the perfect Dark-Haired Northern Duke. But now, he’s obsessed with me!]\r\n\r\n“Once upon a time, there lived a dark-haired Duke in the North. The dark-haired Northern Duke always took baths with cold water, and no matter how cold it got, he never wore outer garments. During tea time, he only drank cold water.”\r\n\r\n“Minelli, who is the dark-haired Northern Duke?”\r\n\r\n“The dark-haired Northern Duke is…”\r\n\r\nWho else could it be? It’s who you’re going to grow up to be.\r\n\r\nI thought I had died in a car accident, but instead, I was reborn as the playmate of the Northern Duke’s heir. But this poor thing is always sickly and in ill health, and destined to have his love, the princess, taken away by another man.\r\n\r\n"In that case, I’ll help him become the perfect Dark-Haired Northern Duke and achieve love!"\r\n\r\nThat was my plan, but…\r\n\r\nWhy is our Setsu so cute and sweet? Can I really succeed?\r\n\r\n“I’m only kind to you.”\r\n