In my opinion, both have their merits. The anime has great animation and sound effects, while the manga allows for deeper exploration of the characters and plot. It really comes down to personal taste.
I'm not entirely sure specifically about 'Nazo Drama' as it could be a relatively unknown or niche concept. It might be a specific type of drama from a particular region or with a unique style. Without more context, it's difficult to provide a detailed full story.
I'm not sure about its popularity. It might be popular within certain niche communities who are fans of visual novels, especially those interested in stories with female - centric characters. However, without more data on its sales or community following, it's hard to say for certain.
I'm not entirely sure specifically as I haven't fully explored it myself, but generally a visual novel is a form of interactive fiction. It might involve stories about relationships among characters. Maybe it's about different aspects of the relationships between 'kanojo' (which might mean 'she' or 'girlfriend' in Japanese).
There isn't much information available to me regarding its widespread popularity. However, if it has unique storylines, engaging characters, and good graphics (if applicable), it could potentially be popular among the visual novel community. Some visual novels gain a cult following even if they are not well - known to the general public.
I'm not entirely sure as I haven't played it in detail. But generally, a visual novel often involves a story with characters and various plotlines. It might be centered around relationships with the female characters (since 'kanojo' means 'she' or 'girlfriend' in Japanese).
I'm not sure specifically what '1940 lo oka gramam' refers to. It could be a very specific local or regional term, or perhaps a misspelling. Without more context, it's difficult to provide a detailed story.
Friendship is a very common theme. Writers often explore how Ayano and Oka become friends and what they do to maintain that friendship. It could be through shared secrets or helping each other out in tough situations.
Since I don't know the actual 'oka manasu full story', I can't say for sure what its significance is. It could be significant to the people who created it, like a story passed down in a family to teach values or preserve memories.