(at around 3 mins) In the English dub version, Cham sings their song at the beginning in English. Later on, when the writer is waiting for the elevator (at around 42 mins), the radio is playing the song in Japanese.
(at around 41 mins) When the script writer parks his car, the elevator call button has a "down" button, but the parking lot is at the lowest point of the building.
(at around 2 mins) The English subtitles give the line shortly before the title card as "without further adieu", but the phrase is the similar-sounding "without further ado".
(at around 18 mins) Mima's mouth moves before she says 'Mr. Tadakoro' after he gets injured from an exploding letter.
No, no, no, no, Damn it.