The supporting character's harem is very normal - Chapter 453 My daughter

Ling Xiao was a powerful martial expert who fell in battle and was unexpectedly transmigrated into another world. He began life anew in the body of a boy with the same name, a fallen genius of the Ling Family whose cultivation had been crippled in a surprise attack, and son to a father who had also suspiciously been crippled under similar circumstances. Armed with knowledge from his previous life, Ling Xiao aim to restore his strength and establish his place at the top of this new world

- Description from Novelupdates

“I, Logan Carter, Alpha of the Crescent Moon Pack, reject you, Emma Parker of the Crescent Moon Pack.”I could feel my heart breaking. Leon was howling inside me, and I could feel his pain.She was looking right at me, and I could see the pain in her eyes, but she refused to show it. Most wolves fall to their knees from pain. I wanted to fall to my knees and claw at my chest. But she didn’t. She was standing there with her head held high. She took a deep breath and closed her wonderful eyes.“I, Emma Parker of the Crescent Moon Pack, accept your rejection.”When Emma turns 18, she is surprised that her mate is the Alpha of her pack. But her happiness about finding her mate didn't last long. Her mate rejected her for a stronger she-wolf. That she-wolf hates Emma and wants to get rid of her, but that isn't the only thing Emma has to deal with. Emma finds out that she is not an ordinary wolf and that there are people who want to use her. They are dangerous. They will do everything to get what they want.What will Emma do? Will her mate regret rejecting her? Will her mate save her from the people around them?

This is just a simple, sweet romantic moments.From A Silent Voice, I Want to Eat Your Pancreas, Your Name, Saekano: How to Raise a Boring Girlfriend, My Teen Romantic Comedy SNAFU, Durarara, and etc