The amount of original characters in the game.
20
The vocaloid who was consistently part of the starting vocaloids for every unit?
Hatsune Miku.
2 songs that came with the Ado tie-in
Odo, Usseewa
A mixed/cross unit event.
Events where more than one unit have a significant part in it
The food item project sekai had a collaboration with.
Cup Noodles
2 characters that share the same likes and dislikes.
Shinonome Akito and Ena
Likes- Cheesecake/Pancakes
Dislikes- Carrots
Rui's only friends till High School.
Mizuki and Nene
The song that has the most notes.
What's Up? Pop!
The only units to have a mixed event as a focus.
Leo/Need, Vivid Bad Squad, Nightcord at 25:00
What Project Sekai did for the first April Fools event.
All vocaloids were seen in the real world and the units had a swap
This character is home schooled.
Yoisaki Kanade
The names of the 5 different sekais
Wonderland SEKAI, Empty SEKAI, School SEKAI, Stage SEKAI, Street SEKAI
The songs that got April Fools covers during the April Fools event.
Aoku Kakero!, Happy Synthesizer, Ifuudoudou, PositiveāDance Time, and Venom
The number that all chartings for 88 shooting stars end in.
88
The unit that had all members get a colorfes card first.
Nightcord at 25:00
The unit that got all the vocaloids in their sekai first, and the unit that got all of them last.
Wonderlands showtime- first
Nightcord at 25:00- last
The song that WASN'T an anniversary song and got alt covers for a member in every unit.
Into the Night
Saki, Mafuyu, Rui, Airi, and An
The song that introduced changing note speed.
Yaminabe!!!! (Dark Hot Pot)
The theme each Nightcord at 25:00 members surname follow.
The number of episodes each unit got for the main stories.
20 per unit
The names of the 3 anniversary songs
1st anni- Gunjo Sanaka
2nd anni- Journey
3rd anni- NEO
The event where "That was a lie, I lied to her just now" came from.
What lies behind What lies ahead
The two character's voice actors who shares the same name as Minori and Rui.
Ena and Mafuyu