This work is also known as Super Mega Hotpot: absurd, hilarious, chuunibyou, passionate, and all over the place.
(A semi-ensemble cast. There is a male lead, but other characters also take the spotlight. The male lead is the main one.)
What is an era?
“Isn't a well-intentioned lie still a lie?”
…
“Tell me, sis, none of this was your doing, right?!”
“Answer me!”
“I promised him I would save this world and the people he wanted to save, even if I had to become a villain!”
…
“I don't want to become some so-called god. I want to lead humanity's evolution. Congenital defects, disabilities, illnesses… all of these… will disappear completely!”
…
“What gives you the right to judge all of humanity?!”
…
“Fantastic! Hahaha, fantastic! Come on, let's fight to the bitter end, until one of us dies! Hahaha!”
Whose era is this? It's our era (the Shattered Spirits') (?)
(This book is set in a fictional world and has no connection to reality. Any countries, values, and policies are entirely my own invention and have nothing to do with the real world.)
(This book may have no female lead, or it may have several. The main issue is that the author isn't very good at writing romance, so it might end up as a BL or a GL story, or something like that.)