From The Study, you'll eventually find a path leading to the Demon Guest House. This area is more residential in feel, with enemies like Ghost (Enchant Soul: increased LCK) and Killer Clown. The Ghost soul is highly recommended for farming other souls. Explore this area thoroughly, as it contains several hidden rooms and valuable items.
Your primary goal here is to find the Malphas Soul (Ability), which grants you the ability to double jump. This soul is typically found after defeating a specific enemy or in a designated room. Once acquired, the double jump significantly expands your exploration capabilities, allowing you to reach previously inaccessible ledges and areas. After obtaining the Malphas Soul, you can return to earlier areas to uncover more secrets.