The Holy Grail fulfills Okita-san's wish to fight with everyone until the end and sends her back to the past.
However, this past seems to be different from what she remembers...
Things to note
1. The story of FGO's boss crossing Hakuoki is divided into the final chapter and the modern chapter. The modern chapter is an SSL manga with a lot of sword dancing. The type-moon related items only appear as background boards and are largely privately designed.
2. I don't criticize all the main characters of the original work. It mainly focuses on a group of young people playing around. If you have CP, choose Shuixian/Zhai Chong.
3. I'll add more when I think of it
Intention: sincerity