If this was an actual anime then it would've been an awesome reverse harem but considering that it's a very short promo video about a girl wanting to be a composer and cute guys playing instruments while falling for her i'd give it an 8 for the producer to choose a cool story line. The reason my score deducted as it did was that it simply wasn't enough to fill my enjoyment even as a promo video. Overall it was still good and interesting to watch in your free time :)