Type-Moon hired Tsukumo, the artist who previously drew doujins of the Fate characters watching the series and playing Fate/Grand Order to draw official comics promoting the Heaven's Feel movies. The first comic was published on the official movie website for the release of the second Heaven's Feel movie and the second comic was published for the release of the third movie.

The censored scene on page 6 is the scene where Sakura masturbates. The censored scene on page 10 is the scene where Shirou and Sakura have sex.

Source: https://www.fate-sn.com/special/manga/

The ending gave me a laugh.
Saber seeing his horrible end and Shirou resigned to stay with a super toxic chick xD

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Is there a chapter 3?

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It's funny how actively ufotable tried to promote HF trilogy, and it turned out to be one of the worst Nasuverse adaptations ever, it's disgraceful.

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No, there's no chapter 3.

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