Heavily pregnant Hatsumi and her sister Chika visit a shrine to pray for a safe birth, but in a tragic turn of events, Hatsumi tumbles down the stairs and loses the baby. 6 months later, Chika's baby is safely born and when Hatsumi visits Chika she find out that Chika named her daughter Aoi, which happened to be the name Hatsumi chose for her own baby...