Ad blocker interference detected!
Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers
Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.
A boundary is the border between two things, such as life and death, or day and night. Gensokyo is protected by a boundary, called the Hakurei Border, to keep it isolated from the human world. Yukari Yakumo has a great power over boundaries.