Right after announcing that he'd graduated from his chuunibyou phase, Shirou Emiya met Illyasviel, who claimed to be his little sister, on his first day at his new school.
He wanted to loudly scold Illya for being disobedient, but she was offering him far too much.
Their intimate life together hadn't even begun, yet one farce after another kept cropping up.
He'd thought a bunch of strange chuunibyou types had gathered around him again.
Then, while fighting some anonymous, kindhearted golden-haired citizen over an eel bento, Shirou Emiya's opponent summoned the Gate of Babylon.
That's when Emiya realized it was all freaking real.
(The synopsis doesn't do it justice. Please read the story.)
