So, my stubborn self has decided to 100% DDLC+ and you may find yourself in a similar predicament. Although it isn't difficult, per se, I figured I'd make this to save yourself some suffering when it comes to Yuri's Weekend in Act 2.

WARNING: SPOILERS... DUH

In Act 2, after Yuri's suicide, you are left spending the weekend with her decaying body. Using the skip button, this normally takes a little longer then a minute. However, to get promo photo #6, you must go through the weekend without hitting the skip button.
I did this and quickly discovered a few things that I wanted to share:
1. The total time to complete Yuri's Weekend is about an hour and a half, with the dialogue running on the "auto" option
2. Speaking of, make sure to use the "auto" option at the bottom of the dialogue box, it'll save a lot of trouble (especially if you don't have an auto clicker installed)
3. As long as the game is running in the background (with dialogue set to "auto") the weekend will progress. This means that, for the hour and a half you must spend to complete the weekend, you can open up another game (ie, I spent my time playing Genshin Impact) or a YouTube tab and do something else while you wait.
After you complete the weekend without using the skip button, you can continue the game as normal and you'll have a nice photo waiting for you in the promo section of "Pictures" on the "Desktop."

I hope this is somewhat helpful! Enjoy Doki Doki!