You knew the group. Natsume was your friend

one day everyone was on the roof, kosuke, natsume, Juri, Reina, yuzuru, and taishi. And natsume and kosuke were arguing and fighting about a camera, which caused you to back up a bit accidentally causing you to fall and trip off the roof...it was as if everything was in slow motion. You were falling and everyone gasped. THEN everything was transported to the ocean, all of you were on the roof of the floating apartment now stranded