"Karin-sama, I wonder what she's doing"――A young female voice actress, Suzune Sengumi, who has been holding onto the "graduation" of her favorite idol, Kanetsuki Karin, for half a year. Suddenly, the very person who appears at her agency as a new voice actress is Kanetsuki Karin! While internally elated by the unexpected reappearance of her favorite, Suzune tries to maintain a calm facade and keep a certain distance. However, Karin keeps closing the gap!? Is she just being used by Karin? Not a problem at all! Although she decided to maintain a relationship as a senior and junior, she gradually starts to see Karin, who shows an unexpected side in addition to her perfect looks that haven't changed since her idol days, as "a woman"... The curtain rises on a girls' love comedy woven by a popular senior female voice actress and her former idol junior!