The Lapis Re:LiGHTs Web Comic is called "Our Prelude" which revolves around the formation of the 6 main Witch Units!

Written by Asano Hajime and illustrated by Hiroichi, dive into a world where Idols use magic to fight off magical beasts!

(Please keep in mind that while the web comic details how each unit came to be, it is not 100% canon as the official manga writers in Project PARALLEL may have differing plans from Asano Hajime)

LiGHTs: A group of 5 unique individuals, all aiming together to chase the light of the disbanded legendary unit, RAY.
IV KLORE: A group of 4 demi-humans, brought together by a strange string of fate.
Konohana wa Otome: A group of 3 sisters from Yamato, recently transferring into Flora Girls Academy in Waleland, struggling to find their stride.
Sugar Pockets: A group of 3 cutesy members who have been interested in each other for the longest time, but never really had the chance to start.
Sadistic★Candy: A fragment of the legendary unit RAY, coupled together with an extremely powerful witch due to their personal circumstances.
supernova: A group of 3 especially talented students, coming together to form a powerful unit

Same story as Mayo Chiki! with the exception that the main character is now a high school girl who suffers from gynophobia. While using the girl's washroom she accidentally discovers that the popular and handsome butler Subaru Konoe is in fact a girl. Now that she knows about Subaru's secret, she must work together with Subaru and her sadistic mistress, Kanade Suzutsuki, to protect Subaru’s secret from being discovered. People who love Mayo Chiki! likes Mayo Mayo! also.

Fifty years ago a witch died and left behind what was called the "Witch's Legacy". It is now the modern day where it is said that whoever collects all 99 pieces of the Witch's Legacy or "Witchcraft" will be granted one wish.

Konoe Subaru, a classmate of Sakamachi Kinjirou, has been serving as the butler of Suzutsuki Kanade in school. Due to an accident, Sakamachi discovers Konoe's secret...that he is actually a she!? Apparently she will be removed from her position if anyone at school finds out. What will unfold from this chain of events?

Hokuto Kuzuhara is a delinquent known throughout Sekai Private Academy. His way of life being so hated by his family that they give him an ultimatum: find a girlfriend within a year or move out. That said, though, months pass and he still has had no luck and it seems like he never will. It is then during this predicament that he is approached by the student council vice president with a plan that would both save him from moving out... As well as help her with her revenge.