Hi Nahryla, thank you so much for trying out the game! We're so happy you enjoyed it ♡〜٩(^▿^)۶〜♡
The demo does not have any alternative "endings" since it only contains content up to Day 1.
Choosing what to do on the first evening will lead to encounters with different characters that night. And depending on your choices during Day 1, there's a secret scene you can unlock on each route 😉