I have a couple of ideas about the ending of the game:
1. the most basic one, we find a couple and leave, which is a great ending
2. the neutral one, we don't find them, and after 365 days on the island, we leave
3. the bad one, we find a couple, but the larvae are inside the heroine, making her a breeding ground for these insects
4. very bad, we don't find a mate, our stay in this insect prison becomes unbearable due to the large number of insects, and we try to call for help in an emergency, but no one comes, and we literally become a breeding ground for insects.
5. secret 1 good? after a few days, we become unbearable to live here, and we leave.
6. secret 2 bad/broken mind? in 30 days (the number can be any, I just used 30 as an example), we get so pregnant that one day we have a dream where we end up in a lair of some kind of insect and we're used as a queen for reproduction, and then we wake up, and if we drink tea and purify our lust, we just keep surviving, but if we don't...then the dream happens in reality and the same thing happens (you can mess around and make your own animations for everyone, like wolves, their own animations, bugs, slugs, etc.)
Phew, I seem to have written everything I wanted to, I'm sorry if something is wrong, English is not my native language and plus I haven't slept for 2 days.
Although I can also suggest that if we don't find a pair in time, they either die or become a treat for insects or breeding grounds.
I hope we're looking for a couple on the lore of the game? Do I remember correctly?
I also wanted to draw a couple of models of what it looks like, but I don't have much free time, sorry.