Nene and Tsukasa

Nene revisits her memories of one particular and peculiar field trip for the fishing club. Amane was there ,including her life long friend, Aoi. Tsukasa had snuck onto the bus that day and was eager to talk to Nene for some reason and ends making her consume what he called, a "fish scale".
Now in her adult years, she's dragged into desire and ends up doing something out of character.
now as a surprising reunion, she is bound to Tsukasa for life, even in whatever weird supernatural thing he gets himself into, and helps to prove both her and him innocent from a supposed crime. she helps to find out the mystery of his "wish", Hanako, who framed them, and the rumored supernatural world.