If by "unlock door event" you mean that you have to unlock the door before the night starts, then be sure to familiarize yourself with this article: https://rec.miraheze.org/Suspicion as this will help you reduce suspicion - no more lockpicking doors
Dev added some event related to certain amount of relationship, which currently for only 20 and 40 work as a must do before you can progress, those are:
20 - cooking together*
40- running date*
60- couch groping*
80- shower scene* and kitchen bj
100 - wake up sex, kitchen missionary, (0.4.3.4) forest prone bone
The * means you have to view them all in order to get the wake up sex scene