origin story
backstory
continuity
origin myth
prequel
reboot
retcon
/suto3/google.iconorigin story
/suto3/Google画像検索.iconorigin story
/suto3/Google定義検索.icon origin story
/suto3/wikipedia.iconorigin story
/suto3/weblio.icon origin story
/suto3/kotobank.icon origin story
/suto3/jisho.icon origin story