The supporting character's harem is very normal - Chapter 13: This is your portion

It’s an anonymous community; please don’t get your identity exposed.

Want to get super vision? Then let’s get some eagle blood.

Want to get super power? Blood of the Bear works great.

Are you going to surpass humans? Exactly, I have vampire blood here.

Do you want to be the ultimate creature? Very well, I have a drop of the blood of the ancient gods here.

…………

Become the headless mayor of the ancient, chaotic city of Arkham, where the gods breed.

Starting from blood therapy, Ross built an extraordinary shelter, a forbidden library, and a museum of the ancient gods.

Ross: We Arkham are full of talented people, and our folk customs are simple, hey! Don’t run! Haven’t visited Arkham Sanatorium yet!

Farming flow, invincible flow, behind-the-scenes black hand flow, Cthulhu.

- Description from novelbuddy

Mara and Maria-Isabel have always been best friends. But while Mara is happily married to Ethan, Maria-Isabel is trapped in an abusive relationship. When Mara and Ethan help her escape, they never expect what happens next.One night, Mara walks in on a moment she never should have seen her husband and her best friend, locked in an intense, lingering gaze.“Tell me it’s not what I think,” Mara whispers, her voice shaking.Maria-Isabel looks away. Ethan stays silent.Their friendship was meant to save Maria-Isabel. Instead, it may have destroyed them all.A story of love, betrayal, and a choice that will change everything.