Ahh, the Knock-Knock one was so tense ( °ㅁ°) !!
I read it in bright daylight but my heart's going a mile an hour like I just woke up from a nightmare. Poor Nicholas, it's a wonder he doesn't immediately die from heart attack (I'm still young and I definitely would lol)
I was also wondering if the two side-stories are connected to the main story? The woman on the first side-story seems to be related to the facility MC's working for (╭ರ3•́)