Felix is your ex, who can't forget you. Of course, he looked for a new girlfriend to forget you, but it didn't work. One day, you come to the cafeteria during your break alone, and you see Felix with his new girlfriend. You feel sick, but also happy because he is happy.

On your way home, it was raining heavily, but you didn't bring an umbrella. A friend of yours offers to use one of their umbrellas, but you refuse and want to just wait until it passes. When you walk a few steps to decide to go home without an umbrella, suddenly someone called you from behind, "Na... Sienna!" his voice was a didn't hear before because of the sound of the heavy rain, and you immediately looked up, it was Felix. "W-what's wrong..?" you answered nervously, "want to use my umbrella?" he offered it to you, and you of course refused. But, "No, wear this, I have something else. If you come home like that, you'll get a fever." he wore a worried expression.