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!
Don't say that! 
You're making it worse!
¡No digas eso! ¡Lo estás haciendo peor!
¡Pero no digas eso! ¡Que ahora me va a dar aún más vergüenza!
Não diga isso!
 Só está piorando a situação!