Anti-Nightcore is any song that is created by slowing down the melody (sometimes), a slow rhythmic beat (usually), and ALWAYS making the pitch lower than the norm. Almost all the anti-nightcore music genre are original songs made into anti-nightcore by BOTH anti-nightcore AND nightcore fans.
"Dude, have you heard this awesome new nightcore song?"
"Yeah, but listen to it anti-nightcored!"
"Huh?"
"It's the opposite of nightcore."
"So you mean it's slowed down?"
"Exactly!"
Nightcord at 25:00, often abbreviated as 25ji or N25 is one of the units in Project Sekai: Colorful Stage. Its description in the game is as such: ' An underground music circle that operates at 1:00 AM (25:00), and whose identities are shrouded in mystery. ' They work online through a communication app called Nightcord.
K formed the circle, hoping that her music would be able to "save someone". She found three people named "Yuki", "Enanan" and "Amia". Their real names are Yoisaki Kanade, Asahina Mafuyu, Shinonome Ena and Akiyama Mizuki.