It's just a one shot idea

Yn ln a friend of Clark Kent as Yn knows Clark is superman Superman Yn works at the daily planet Yn meets Clark cousin Kara as they started to getting to know each other till Kara started acting weird as Clark tells Yn that it's her kryptonian heat phase Clark explain that Kara will hunt Yn to start reproducing as Yn runs for his life to not get snu snu without consent yn hides hopefully Yn can wait long enough for the Kara heat phase was over

Preview

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Yn:I got run

Yn heads to the elevator as Yn sees Kara smiling creepily at Yn and blows a kiss to Yn quickly leaves the daily planet to hide till Kara heat was over

Ship Yn x Yandere Kara/supergirl