H/Hr stranded on an remote island with friends. (minor Hermione/Terry) [Portkey Archive]

I'm looking for a story I read a year or so ago on portkey archive I'm pretty sure. I remember a few points but I may misremember some stuff.

Spoilers warning. I'll probably spoil major parts of the story.

1. Harry/Parvati or Padma were casually dating. I think they were intimate. Hermione happens upon them one day.

2. Hermione secretly pines after Harry and this causes her to go into Terry boots arms, who's her boyfriend. Hermione grinds on him.

3. Their year is going for a trip somewhere I think.

4. I believe for some reason Terry and Hermione have broken up by then. Hermione and Harry have a brief fight. Hermione goes to her room in the boat where Terry finds her. They make up and then do some heavy snogging and groping.

5. Their boat meets an accident and the students are scattered. Hermione and Terry and some others are in one place while Harry is in another. They all make it to an island.

6. There, all of them wash up one by one. Harry comes later on while Hermione was very worried about him.

7. The survivors split into two groups in the island, making their own camps, terry and harry are in seperate camps and I think they each lead them.

8. Many things happen. Harry and Hermione start getting closer. I think Hermione chose Harry's camp.

9. There was something related to hunting a dinosaur or a tiger. It was a wild animal that they were supposed to kill.

10. I think something happens which causes Terry to lose it and end up on the bad side. I think there were other bad guys involved too.

11. Anyway, Terry's plan fails( don't remember what the plan even was) and they all get rescued as H/Hr are together by now.

Please note I maybe mixing up and getting many parts of the story wrong. I only remember bits and pieces of the story. Please help me find it.