Mature Content Description

The developers describe the content like this:

This DLC may contain content not appropriate for all ages, or may not be appropriate for viewing at work: Some Nudity or Sexual Content, Adult Only Sexual Content, General Mature Content, Frequent Nudity or Sexual Content

About This Content

• Profiles for every character, complete with commentary by the staff
  
• A guide to Morningwood, including shops, items, affinity, and dating
  
• Detailed illustrated walkthroughs for every route, story scene, and heart event
  
• End-of-story flowchart to help you get all 20 endings
  
• Information about the special route that opens on your second playthrough
  
• Guide to Steam achievements
  
• Everything has been checked against the game code line-by-line to ensure accuracy!

• Detailed discussions of every member of the main cast, including character analyses, story breakdowns, and a behind-the-scenes look at how they evolved during development!
  
• Galleries of scene mockups and Backgrounds!
  
• Never-before-seen concept art!
  
• You asked for it; here it is: A special post-ending story for Tomoki and the twins in the form of an exclusive, smoking-hot 7200-word short story penned by Cort Channon, with a bonus illustration by Mazjojo!