Kimi ja Nakya Dame Nanda君じゃなきゃダメなんだ。 ; 非你莫屬 ; 非君莫属 ; It Has to Be You ; It's not okay if it's not you. ; Kimi ja na Kya Dame Nanda ; Kimi janakya damena nda. ; Người anh thất lạc

Nanoka's grandfather, right before dying, tells her that she's not alone -- she has a brother. But when Nanoka arrives at the address her grandfather gave her, she finds out that there are two brothers there! They aren't related by blood, and Nanoka has no idea which one is her brother. Is it Aoi or Kou?