After My Childhood Friends Fiancé Was Taken Away, and I Was Subsequently Banished Along With the Saints Stepsister, I Decided to Watch as Those Who Betrayed Me Meet Their Downfall

Native title: 幼馴染の婚約者を寝取られた挙句、聖女の義姉諸共追放されたので裏切った連中が滅亡していくのを眺めていることにした。