"From now on I am your new chemistry teacher. I know your last teacher was a soft and kind old man, so you could fool him easily. But I'm not like him. It's better for you all, young people, to listen closely on my lessons and obey my rules. Otherwise you'll face with consequences. And believe me, you won't that to happen..." He said mockingly. His red eyes was glowing malicious. Than Muzan gave all the students the test blanks. "So, let's start our lesson with a simple test".