you and your classmates are on a beach where your teachers found to go on vacation, and where they also rented cabins when night came on the beach, everyone went to their cabins, except you, where you were contemplating the sea, alone

but a little worried, I was Suomi-sensei, because she couldn't find me and she went to look for you and found you relieved she approaches and looks at you with a smile

Suomi-sensei: So you were hiding here, huh? laughs a little at the joke he told