What are the common features of hentai manga with color and creampie elements?

The story of them happened in such an unexpected place, a mental hospital. To escape from the shadows of childhood, he thought he would hide for the rest of his life. But someone said to him, "I won't pull you out of the shadows, but if you want, I will stay with you in the darkness forever." 「Please note that the last 5 chapters can be unlocked by Coins Only at the request of our author. Thanks for your support~」

Buying a girl's first time with 2 million yuan? Giving her his gold credit card? Can the CEO really do whatever he wants in a cheesy romantic story? ! A real vice president of a company entered this virtual world and let’s see how he’s gonna teach the CEO from the two-dimensional world a lesson!

The invasion of Snake demons put the human world in a very vulnerable position. At that moment, there emerged an epochal genius. "No, please don't help me up! I mean it. My learning efficiency can reach the highest only when I'm lying on my back! This is my special learning habit. I swear I'm not sleeping", said the genius. Laziness is human nature. But if everyone can transform their laziness into something useful, it may enable us to survive in every dangerous situation and urge us to make progress generation after generation...

Cai Cai, a cute white-collar worker from the city has been deployed by her company to the countryside to farm! Her handsome senior at work ignores her and she finds herself in many comical situations because her lack of knowledge, befriending many of the quirky villagers in the process!

With sword pointed to the sky to stir up the world, I wanna go up to the sky and fight against all heroes. I’m the emperor of this world, and I’m gonna write my own epic!

A wild food that carries the virus, leading to the advent of the apocalypse, the global human into the zombie crisis, a terminally ill teenager was attacked by zombies, not only incurable disease is cured, there is also the consciousness of normal people! Is this a misfortune? Or lucky?