Melancholy Memories Achievement GuideFor this achievement you have to interact with Lily's Drawing on the wall by the banister, Sebastian's desk on the 1st floor
, Myra's Letter on the Kitchen table and Myra's achievements in the Living room on the shelf.
Edit 28/10/17 - New Paralyzer - "The letter isn't even part of the achievement. It pops with the 3"
Make sure to not interact with Myra's letter on the table twice before interacting with the items listed above as a cutscene will be triggered resulting in you leaving the house.
Hope this helped.