prequel
前日譚
Backstory
List of prequels
Sequel
Spin-off
Origin story
/suto3/google.iconprequel
/suto3/Google画像検索.iconprequel
/suto3/Google定義検索.icon prequel
/suto3/wikipedia.iconprequel
/suto3/weblio.icon prequel
/suto3/kotobank.icon prequel
/suto3/jisho.icon prequel