In the last breath, Kaede brought back Anna's original form, the agent who... apparently was a woman (how the fuck did I miss that) and Bandou too, much to Mayu joy. Shame she didn't brought back Mariko tho'
Kouta went to their meeting place each year, in the mean time married Yuka and had a daughter who they named in respect, Nyu.
Think it's pretty clear that those twins are Kaede and Nyu reborn from her Dissociative Identity Disorder, while only Lucy died back then at the lighthouse.
Looks like Kurama has lied to Kaede about Aiko's death, since her mother was named Yukie Takada. This was his nail to the coffin which he should regret, since Kaede promised him she will kill everyone who he loves. What a dumbass.
It was pretty good story to read, plenty of twists and red flags that came true, which was both disappointing but didn't held back like most stories with plot armor.
Sad ending, but with a silver lining.
10/10 will read again after watching anime.
Thanks for scanlation till the very end!