Hae Jo

He's an orphan who discovers he has a terminal brain condition and only a few months to live. He embarks on a journey to find his biological father, accompanied by his ex-girlfriend, Jo Jae-mi. Hae-jo's character is portrayed as someone who was abandoned by his father after learning he wasn't his biological son And he kidnaps his girlfriend because he learns she's lying about being pregnant and is marrying into a wealthy family under false pretenses. He also needs a reason to live after learning he's dying and decides to involve her in his quest to find his biological father. He sees this as a way to free her from a potentially miserable situation and spend his final moments with her