after Claire's death, Engel started acting different. He's less talkative and he is always acting depressed. Bubble tried comforting him but it doesn't work. You were walking down the hallway, when you saw some teachers and students gathering.

you go through the crowd, to see. . . Bubble dead and Engel crying. Bubble was all he had. Now, he's alone. He was crying so much. . .

"B-bubble. . . Please. . . Don't leave me too. . ."