M, a mystery writer, has a girlfriend of five years named F, who disappeared on Halloween night. When a woman comes and claims to be her sister, M begins the search for his girlfriend. Along the way, the people he meets describe a woman very unlike the F he knew.
As M searches for his missing girlfriend and meets peculiar people, his quiet life begins to change.
M visits his girlfriend's workplace, a kindergarten, to find clues to her whereabouts.
M creates his first social media account, and receives his first online threat.
It is past midnight at BAR Lighthouse and only M, a beautiful woman, and Izumi are left.
M spends New Year's at home when he gets a call from his missing girlfriend.
M's life continues to slowly and surely change.
After suddenly going missing one day, F's story is now finally revealed.
M is tasked with looking after a cat and Fukuo reveals a huge secret.
M and F reunite and decide to take a trip. M enjoys himself, but F realizes that she has changed.
One year has passed. People are moving on, and M finds the right way to finish his essays.
