キュン死
  きゅん死
  キュンし
  キュン死
  きゅんし
  きゅん死
  noun (common) (futsuumeishi)
  noun or participle which takes the aux. verb suru
  see: きゅん
  colloquialism
  one's chest tightening up (from emotion) so much that one feels one's heart might stop
  "dying of cuteness"
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