There is also 'Steins; Gate'. This visual novel is famous for its complex time - travel plot. The story is full of twists and turns, and the characters are unique. It has been highly praised for its engaging narrative and scientific concepts.
First, you can search for some well - rated 'onee chan visual novels' on gaming platforms. Look for ones with high user reviews. Then, start with the ones that have more beginner - friendly themes or gameplay if available.
Well, 'eroge tensei onee novel' might be a piece of literature that combines elements of eroge, which often have adult or sexual themes in Japan, but if we assume it's not that kind of content. It could be about a story where a character experiences a reincarnation in a world that has some unique features and an important older sister - like figure in the plot. Maybe it's about the character's journey and how this 'onee' character influences it.
I'm not sure specifically as there could be many novels with this title or related to this phrase. It might be about a story where the protagonist is transported to another world ('isekai' means another world in Japanese), perhaps with adventures, magic, and new characters.
Writing fanfic that involves sexual content is generally not appropriate as it can violate ethical and moral boundaries, and may also go against the terms of use of certain platforms. Moreover, it objectifies the characters in an improper way.
It could be about a heartwarming friendship. The Onee San, an older sister - like figure, takes the reader under her wing. She might teach the reader valuable life lessons, like how to cook a traditional dish or how to handle a difficult situation at school or work.
The 'isekai kara kita yuusha novel' likely tells a story full of fantasy elements. The hero coming from another world is a common trope in isekai stories. He could be summoned there by some magic or accident. Once in this new world, he may have to adapt to different cultures, magic systems, and races. His experiences would form the core of the story, which might include battles against powerful foes, exploring unknown lands, and uncovering the secrets of this new world.
One common theme is friendship development. Since kita and bocchi are often characters in a story, their friendship might be explored in depth, showing how they get to know each other better over time.
Since I'm not very clear on the exact nature of 'eroge tensei onee novel', it's difficult to recommend exact similar works. But if it's about reincarnation and a key female character, works like 'Tensei Slime' which has elements of reincarnation might be somewhat related in terms of the reincarnation aspect.
Often, a cliche childhood friend onee-san manga has repetitive tropes like the childhood promise that always comes true or the overused protective older sister stereotype. Also, the story might lack depth in character motivations and have very straightforward story arcs.