The term 'haha futari hentai manga' is quite cryptic. Maybe it's a manga featuring a couple in some sort of funny or adult-oriented situation, but without additional details, it's difficult to provide a precise understanding.
It might be a romantic - comedy genre. The 'futari' (two people) aspect often lends itself well to comedic situations in love stories. And since it's a love story with a 'step up' which could imply some sort of development, it could have elements of humor along with the romance. For example, the two characters might get into funny situations as they try to move their relationship forward.
Since I don't know the exact details of 'futari ecchi step up love story', I can only make some general assumptions. In a love story, there is often an initial attraction between the characters. In this case, perhaps the 'futari' (two people) start with a certain level of connection, and as the story progresses, they 'step up' in terms of their emotional commitment. There could be plot twists, like misunderstandings or external factors trying to pull them apart, but ultimately their love story unfolds in a unique way that the title implies.
They often have exaggerated expressions and gestures to make the professors seem comical. Also, the situations they find themselves in can be absurd and unexpected.
The spread of comic vine often ties into popular culture as it becomes a source of inspiration for various media like movies, TV shows, and video games.
There's a wide variety of cartoons in New Yorker, covering various themes and styles. They often offer satirical and humorous takes on current events and social issues.
On Pinterest, there are cute cartoon couples from various genres. You might come across couples from fantasy stories, romantic comedies, or even adventure-themed cartoons. The variety is endless!