Thanks for playing!
If you want an intro, there is a txt file you can download on the game's page that gives some background information and some of my comments on the game. Unfortunately, this game is the first one I've made that assumes you know a bit about the characters already ^^; The only character interaction is in the dates, so it makes sense that you have no clue who they all are.
The circle on the player is your hitbox. If a bullet touches it you die, otherwise it will play the sound if you are near to one, this is called "grazing" and it actually charges your camera slightly faster. There is always a way to avoid the bullets in this game, as long as you plan ahead. The camera clears bullets even if you don't take a photo of the boss, so you can use it defensively.