▼ Looking at the Steam page, the game’s genres are “cute,” “anime,” “visual novel,” and…
▼ And then just like that, the warnings disappear, and the bright, colorful, happy title screen appears complete with cute animations and background music!
It's really a shame that people automatically label these games as "adult only" because, in many cases, is not true.
In the case of indie developers, few include racy themes or art as they are often trying to appeal a more family-friendly audience.
Usually the endings all feature a beautiful art moment but you can also use it for other particularly important points of the story.
I did everything with a spreadsheet program but there are also other useful "mind-mapping" programs including Free Mind.
It's not always necessary to use them - especially with good tools like Ren' Py available - but they can help.
Learn to use it well enough and you can also create a visual novel role-playing hybrid much like my RPGs Loren The Amazon Princess As you might imagine, visual novels include a lot of art.
I'd dare to say that, for a commercial product, the art is as least as important as the writing, if not more.