What are the common themes and elements in a hentai gangbang comic featuring lewd big breasts and creampie?

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!

Li Nianfan transmigrated to an immortal cultivation world as a mortal. Knowing that he could never become a cultivator, he decided to live an ordinary life. But unbeknownst to him, his dog became a mighty Yaoguai king by watching him draw and write; the tree he planted in the backyard became the tree of the world by listening to tunes he played; a passerby he met, who gained enlightenment from the chitchat with him, became a Taoist sage and started a new era...

Like everyone else, Yun Caiwei found herself transmigrating into the past. Unfortunately for her, she was thrown into the shoes of a frail, delicate girl. Worse still, her male lead is a huge tiger! In his human form, the tiger flirts with her, pampers her, and possessively dominates her. In his tiger form, though, he becomes... an adorable kitty?

hat? My lazy, coquettish and evil elder sister is not related to me by blood? What? She wants to be a big star. Luckily, I have an omnipotent system, so I can help her clear all obstacles! What? Mom and dad asked me to help her with her singleness. I'm still single! Why don't you care about me? System: I think you're a good match. I'll set you up. No, I refuse. I'm miserable to be her younger brother! I don't want to be my own brother-in-law!

With the soul across the Millennium, she has become the daughter of the down-and-out film emperor? All right, let those who addict to me thrive! Look at how I, together with my father and brothers, change my fate and become a lucky little one loved by all the group! But…being spoiled, I found that the expression of eyes of one of my brothers on me has changed …

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...