No.? Singularity, turn on.
Arjuna, who got the Holy Grail, returned to the eve of the Kulu War.
"Master, if you want to protect the future of mankind, please break Karna's curse first."
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Although there are some references to the original work, this is essentially a fanfic of the "fate grand order". The characters of the heroic spirits are mainly based on fate, and their personalities during life are mainly based on the original canon.
I'm really sorry for the fans of the TV series and the original series who accidentally poked this in. However, if you can accept fate's settings, you can still watch it.
It's all OOC... It's my fault that I haven't read the original novel.
It doesn't matter if Karna and Arjuna's relationship is understood in terms of CP or not. Others may be mentioned by a few CP pairs, such as Kui Zhou, Master x Mashu, and Arash x Green Tea, but the CP tendency is not obvious. What is not mentioned here is that even if it seems a bit ambiguous, it is 100% friendly and has no impurities.