Hi, I'm almost 22 and my manga deals with the way society treats animals. It's for a mature audience due to the tone, violence, and, language. It's going to get very dark, especially when the story progresses.
Here's the synopsis.
"Suffering from insomnia, Young, anti-social doctor Mr.Bleak is a world-famous animal rescuer and an investigator from New York City, rescuing animals day and night. Fed up with the corrupted society that exploits innocent beings then misleads the public into buying"
You can find it on Tapas and read it traditionally
Or on Webtoons and read it vertically.
I'm currently on a hiatus but I should be returning on a consistent basis sometime in 2020. If you don't mind that, please check it out, I hope you enjoy it. I have so much planned for this series.