She says, "I am student council president Matsumoto Rise. Nice to meet you." Oh, and I'm science teacher Nishigaki Nana. I'm always looking for new explosion buddies.... What? You're lonely because the second years are away on their school trip? Don't worry, I'll stir up some ruckus for you.... No, I'll make some tea. It's not bad getting a change of pace from my experime---BOOOOM!