Someone steals Kaori's heart after her death. Ryo meets an assassin named Glass Heart with a scar on her chest after a year of searching for Kaori's heart.
Xiang Ying, also known as Glass Heart, is rescued from the secret organization by Ryo. With Ryo's support, Xiang Ying tries to live her life as an ordinary girl, but she can't resist her ability to fight despite all her efforts.
Falcon meets a girl, Miki, who is widely known as 'a girl who brings happiness' in the city. Noticing Falcon's change in behavior, Ryo begins to investigate Miki.
Ryo's first client after his return to work is Takahata. Takahata asks Ryo to find a family of his heart donor.
