Saiki Kusuo no Ψ Nan: Season 2, Episode 7

2 - 7: The Shipwreck of Saiki K. (Part 2) + The PK Academy Press Club Guillotine + Farewell! The Last Day of Summer Break

The classmates are still stuck on the island but manage to complete a raft. Metori demands they decide who will ride and who gets to stay behind.