永远的弹幕少女芙兰 ~ The endless Danmaku by U.N Owen

Flandre has become the strongest existence in Gensokyo. But the strength has caused fear, and these fears have gathered into a mysterious power... Fran was finally locked here by the shadow from the outside world and Koishi. Although it is just a danmaku game with rogue elements, the mystery behind it cannot be dispelled. Until... the space is shattered and collapsed, can the eternal Danmaku girl …