“Side story” in Japanese
Short answer
Side story in Japanese is “挿話” (souwa). Full meaning: episode, side story, story within a story, aside, anecdote.
Other ways to say “Side story” in Japanese
サイドストーリー
saidosutoorii side story
外伝
gaiden supplementary biography; anecdote, side story, spin-off
ガイデン
gaiden supplementary biography; anecdote, side story, spin-off
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