The strength of the seal that keeps demons and other evil creatures from entering the Eastern Country via the Hakurei Shrine, which also serves as an entrance to the “outside world” as you and I know it – has been diminishing. Reimu decides to go in of her own volition to see whether the cause is in there, and needs beaten up. (It does.)

The strength of the seal that keeps demons and other evil creatures from entering the Eastern Country via the Hakurei Shrine, which also serves as an entrance to the “outside world” as you and I know it – has been diminishing. Reimu decides to go in of her own volition to see whether the cause is in there, and needs beaten up. (It does.)