Heroic Spirit Emiya Shirou: I'm a single dog myself, yet I have to set my dad up with someone. My heart is so tired.
Heroic Spirit Emiya Kiritsugu: I'm a single dog myself, yet somehow I already have a wife, kids, and a daughter. I feel @#%...
Heroic Spirit Illyasviel: Why does my brother have so many female friends? No way, Shirou is mine!
Heroic Spirit Mom: Oh my, my husband doesn't remember me. What should I do? Waiting for an answer online, urgent!
This is really the story of the Emiya family wandering through various worlds after the two great Counter Forces exploded at the same time. A story full of love... well, something like that.
Didn't see that coming, did you? From the oldest to the youngest, every single one of us in the Emiya family is a Heroic Spirit!!
(The above is all speculation. Please refer to the actual story for details...)
Worlds visited: My Hero Academia - Fate/Apocrypha - Britain - Magical Girl Illya - Fate/Zero... - Grand Time Temple - REC - Overlord - Shinjuku - FSN (FHA) - FSN (HF) - Sougin