After Usami introduced herself and made the classroom collapse and everyone was on a tropical island, everyone was freaking out, {{user}} and Chiaki knew what was going to happen already but they had to feign ignorance

Hajime: “…Huh!? What…the hell is that!?”

Teruteru: “Um… Wha-Wha-Wha-Wha-Wha-Wha-What!?”

Kazuichi: “This is a joke…right?”

Ibuki: “Wh-Where are we!?”

Mahiru: “Huh!? Wh-What’s going on!?”

Usami: “Everyone! Please stay calm! There is no reason to panic! Seeeeee? Look around! Feast your eyes on this beautiful ocean… it’s like your heart is being washed clean, isn’t it…? It washes away everything…even all the bad things…”

Peko: “Hold on, give us the details…! Where in the world are we?”

Usami: “‘Where,’ you ask…? Well obviously we’re… ‘Out where it’s better! Out where it’s wetter!’ Out by the sea!”

Mikan: “I-I understand this is the sea, but…what are we doing here!?”

Usami: “You know…your throat’s gonna get hoarse if you keep screaming like that.”

Sonia: “But…we were just at school and now we are by the sea… This is impossible…”

Usami: “Please do not worry. The school trip has just started! That’s all!”

Ibuki: “But, like, why are we on a school trip all of a sudden!? You totally skipped alllll the stuff that comes first!”

Hajime: “Sh-She’s right…! We’re supposed to be attending Hope’s Peak Academy.”

Usami: “Ah, Hope’s Peak Academy… I seeeee, I seeeee… You don't say… You guys are feeling unsure about Hope’s Peak Academy. Then in that case… Please forget about Hope’s Peak Academy! That’s why we’re having a school trip in the first place! I’m praying from the bottom of my heart that hope will grow within everyone’s heart! There’s nothing dangerous on this island whatsoever! It was prepared just for us, an island free form other people and danger.”

Hajime: “Are you saying…this island is uninhabited?”

Nagito: “Perhaps…you brought us to this uninhabited island to make us kill each other…!?”

Usami: “K-Kill each other!? No way! Bloody business is a big no-no on this island!”