Read this article, its great stuff. Your target audience doesn't exist
So the gist of this article can be summed up simply: The most successful games are not products in a market, They are the creators of their own market.
Something I want to make very clear, very quickly, is that this is not saying victory belles is wrong to be a ship girls game like kantai colllection. But what it is saying is that Victory Belles need to be more just the KanColle of the west. I feel I can best make this point is by looking at the FPS genre and its three leaders (at least in recognition) Call of Duty, Battlefield, and Counter Strike. I doubt there are too many people who would try to argue that these games are not exceedingly similar, however each brings it own things to the table And creates it's own culture. Call of Duty offers small maps and tight controls requiring a quick response in order to come out on top, whereas battlefield often has larger maps that more reward those observant of the flow of battle (I'm not really what counter strike offers other then shity anti hack, not at all a fan).
So its clear multiple games can exist in the same genre while creating their own markets, Their own culture. yes there will be overlap, but the reason markets like the FPS and MOBA are so hard to get into is that so few companies approach it as trying to carve out a market and a culture of their own, and instead try to muscle in on those already establish. Quote: "It’s not enough to just offer a superior product with better marketing and brand recognition to convince players to switch...". This means Victory Belles should not be another game in the ship girls market, but rather it should create the Victory Belles market in the ship girls genre. Victory Belles is going to be plagued by its comparisons to Kancolle (hell I can't even help from doing it here) and what's going to be more important then anything is going for Victory Belles to be designed and marketed as a game that, even if more similar than different, must make itself distinguished from Kancolle. Victory Belles has already done itself a huge favor by making its art style distinguishable from Kancolle and I wish to give huge props to your art director a huge thumbs up for that.