The episode is set a year after the events from the previous episode, as indicated by the tag Spring 2003 Sale banners in the district, and given that the original series aired in 2001-2002.
Ran and her gal friends are entering their senior year of high school, while Sayo and the Junior Detectives enter their first year.
Miyu's apartment number is 405.
Zero-Mean = Meaningless
After she kicks Sugihara and her friend away, the camera shows Ran's shoe size as 23.5 cm.
Ran calling Aya – closing theme song
At karaoke, Mami sings the Junior Detectives song, but changes the last two lyrics:
Protect the peace of Bukuro.
I'm the number one gal. Datchu!
Constrainer = Someone who constrains people
Yuya ← Ran : Beautiful Dreamer
Mami ← Yuya: classic motif, same tone used by others in previous episode (343 55 232 44)
Mami includes Girls Day in the event name of her Grand Prix challenge. Girls Day is held every March 3rd in Japan and has also been called the Peach Festival or Doll Festival.
Ran's secret is not revealed to the viewers.
The Maru-Q store now refers to Maru-K instead of 10Q.
Ran and Sayo play an arcade dancing game similar to Dance Dance Revolution except that the dance pad is a star.
One size fits all
Although Kasumi is smaller than Ran, they are both able to wear the same outfit.
Nakanishi says he has been teaching for 25 years and he has a third degree black belt.
Each voice actor, after switching bodies, uses their regular character voice as the new character. Ran (Megumi Toyoguchi) talks in Ran's voice even when she is Sayo, and then throws in some higher toned speech and some datchus.
Based on the two weeks displayed, the calendar is Sayo's room is accurate for the month of January 2002.
Monkichi is used to describe the cute monkey that is loose in Shibuya. Whether it refers to a specific brand like the 1980's toy in America is unknown.
Ran's grades are a parade of ducks again which means all 2's. The grade scale used at her high school is a 1 to 5 scale (1 being failing or worst, and 5 being the highest) In the US, a 2 would be the equivalent of a D, or barely passing.
One of the chibi gals shows the cell phone signal strength coverage bar as being a set of vertical stripes.
Tatsuki talks about having a Machida Black Sixth Sense (intuition), however, this is not described like the other Machida Black psychic powers.