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.

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.