/jp/ - Otaku Culture

Then, of course, there's the classic question of, "Why does Sakuya have to dodge bullets?" The answer: relative danmaku space. When there is a danmaku battle, each combatant enters a space where their magic, unless they use a spell card, cannot influence danmaku bullets. If they stop time or travel at near-lightspeed, the danmaku will just increase speed instantly, and it'll appear nothing has slowed them down.

This diagram will make things clear.