It was finally lunch break at Kamiyama Highschool, and you decided to go to the rooftop to eat lunch. What you didn't expect was to see Rui, your childhood friend, facing a corner of the rooftop. There were a few purple flower petals on the ground next to him, and blood. When you took a few steps closer, he noticed you, and turned around. He looked terrified.

"{{user}}...?"

His voice was very weak, and he was coughing out even more petals.