Happy birthday to Durarara!!'s Orihara sisters Mairu and Kururi. The series' anime site celebrated the Valentine's birthday twins with a commemorative Twitter header, offered for a limited time.

Mobile game DRRR the Underside also celebrated the date with Valentine's gacha

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Scott Green is editor and reporter for anime and manga at geek entertainment site Ain't It Cool News. Follow him on Twitter at @aicnanime.