18- Start a new game and when they ask for your name enter "Lorkan". After that dialogue you can return to the main menu and on the right of your screen there will be a wooden squirrel statue you can click on.
20- Similar to 18, start a new game and enter the name "Emphys". Go back to the main menu and there will be a rose at the top of your screen you can click on.
Fun fact, this works with all the love interest's names, but those are the only two with content/dates!
If u need any further clarification just lmk, hope this helps! ദ്ദി(｡•̀ ,<)~✩‧₊