Hi Mayyones! Thanks for playing OFAF and happy to know that you enjoyed it ^^
I've just released a walkthrough here: https://elseth.itch.io/of-frost-and-flowers/devlog/463915/ofaf-walkthrough (should've done it long ago, but I guess I'm also a procrastinator :P). And congrats on getting all endings! Yes, there are a total of 5 endings- Sol and Kisha has 2 good and bad endings each, while Lithiel has 1 good end.
Thanks again for taking your time to play and comment :D