The supporting character's harem is very normal - Chapter 310 Lathel’s speculation

Ukei Kaito fought a desperate struggle in order to fulfill his role as a summoned hero. He defeated the Demon Lord and saved the very world, only to meet an end filled but with betrayal. The companions that he’d trusted throughout his journey betrayed him and killed him by sticking a blade through his chest.

Diablo Volfir, a mighty magician, was sealed for aeons due to the schemes of the 12 Gods, but 66666 years have passed since then, and he descends to earth once again!

“You’re ours,” Varen whispered, his voice a velvet threat, “and we don’t share unless it’s with each other.”I was never supposed to matter.An omega raised in the shadows, hidden behind my warrior family's shame, I only ever wanted to survive. Maybe, if I was lucky, find love with someone like me— someone quiet. Gentle. Unseen.But the moon had other plans.And under its eerie blue glow, three impossibly powerful, dangerously beautiful Alphas—triplets— claimed me as their mate.Varen. The charming firebrand with a wicked tongue and a sugarcane smile.Kiel. The silent forest poet who sings to wolves and kisses like moonlight.Thorne. The battle-scarred leader who doesn’t believe in fate... yet burns when I walk away.They were meant to lead the pack.I was meant to be nothing.Now I’m caught between them — between chaos and devotion, between savage protection and secret longing. I should have run the night they called me “mate.” But when my bloodline reveals a rare power the world thought extinct, I become the key to a storm that could tear our world apart.Betrayal bleeds through every shadow.My family sold me.My enemies want to own me.And love? It was never supposed to look like this.But maybe fate didn’t get it wrong.Maybe I was never made for one mate.Maybe I was made for them all.

Almond Crowshade was the last surviving human in a dying world whose people failed to conquer the Grand Abyss Labyrinth’s 30th floor in time. The world was getting destroyed, and Almond was the last one challenging the 30th Floor multiple times despite the imminent destruction of the planet. He ultimately defeated the Floor Boss on his dying breath by achieving a true awakening, acquiring an X-rank Trait that signified limitless potential. Alas, he won but there was no home or future for what he fought. But a mysterious figure arrived there, feeling pity and amusement. “This is too precious and fun of a toy to let it rot here. You shall reincarnate and climb up to make things interesting.” [Transfer to another world commencing…] [Your memories will be sealed, and you will reincarnate in another world that has welcomed Grimworld’s tutorial like this one. Clearing each floor of the Grand Abyss Labyrinth will unlock a portion of your memories, until the 10th Floor upon which you will gain your full memories.] ‘I’m giving you a second chance. This time, you must clear the Grimworld’s tutorial and step onto the big game to make things instresting and entertaining.’ [Good luck.]