One day Nao misses the last train while returning to his home after finishing his overtime .

He meets a drone flying around in the subway while getting curious of a drone hovering in a empty station , he follows it out of curiosity which leads him to a construction site where he see a ship , he enters it and find a wired creature in it.

He gets sacred and runs home with a rental bike and strangely falls asleep just after locking his house.
In the morning he feels a soft sensation and
finds himself sharing a bed with a girl, quietly escaping the new found company he goes to his bathroom only to find a familiar drone hovering around .