Fireworks at That Time

This article is relatively slow, but I won't give up on it, because the paper version has already been written, and the relationship between the characters is quite complicated, so don't jump into the trap if you are impatient. —————————————————————— See the sky full of solid blood flying, I can't help but feel sad. A charming smile, a moment of splendor. Can it be worth a lifetime's sacrifice? Speechless, but seeing the world, But like fireworks without thinking about sorrow, The smile is still young.