"You are going to be so successful one day. And that's when I'm able to come back. Don't search for that day, don't long for it, and don't rush toward it. You'll know exactly when that day is once it's come; I promise you that if you push me as far away from your mind as possible you won't be heartbroken. That day will come faster and may just catch you off guard, but don't worry about it, don't worry about me. I'll be fine. And so will you..."
His body was fading fast; first his legs started to dissolve into thin air, followed by his torso. He stroked Yujin's cheek gently as he spoke to her, trying to persuade her that everything was going to be okay even though he was leaving, that her life would get so much better once he left. He didn't know if he'd actually be able to return to her like he promised, but it was better to give this poor girl some hope and something more to look forward to in the future.
She grabbed his hand and squeezed it tightly, the tears coming down her cheeks even quicker than they were before. "No no no, you can't leave me, please... Mister... you can't leave me... Not now! Not when I need you the most!" She dropped her head down and cried harder, gripping Mister's hand even tighter. "I can't lose you..." she choked out.
Mister smiled weakly and kissed the top of her hand and tried to pick Yujin's chin up with two fingers. "Come on, don't cry..." he whispered as she fell forward into his shoulder. She shook and shuddered as she cried and sobbed, and Mister was looking around, making sure no one could see this scene. They would only see a little girl on her knees, weeping and leaning on some invisible object. He had to leave her; he had gotten into so much trouble at the Dome for revealing himself and would have to go back to the Academy to re-learn everything. It was something he didn't want to do for the fifteenth time but he knew he had to; it was more than necessary. He had to go and make another little girl's life happier and cheerful. He had a sworn duty to protect all those lonely until proven loved. What didn't help this situation was the fact that Mister had fallen for this girl. Fallen as in loved this girl dearly with his entire being. He was not yet capable of showing such emotions as true love, but this little girl, Jang Yujin, held a place in his "heart".