The Forever Moon is a puzzle adventure and visual novel doujin game of Touhou Project. It is a love story about Kaguya Houraisan and Fujiwara no Mokou, and a story of Eientei, Bamboo forest of lost and Hakurei Shrine.

I closed the door and got ready to leave Eientei with nobody. The sky was drizzling with rain, and the air in the bamboo forest was faintly cold in the spring. I brought the sorted relics, looked at this familiar and unfamiliar place, I had a lot on my mind. From the terms changing of the Miko of Hakurei shrine, to the last warning of the Moon's Capital, I saw Kaguya and the other went back to moon. There's been a lot of big things going on lately in Gensokyo. I never thought before that there really was a day when Kaguya would disappear from my sight forever. But now, it's literally happening right in front of my eyes. The pharmaceutical industry, which Eirin had just established a short time ago, had just taken a slight turn for the better, and then it came to a standstill forever. The gates would be left unlocked, perhaps giving shelter to passing monsters or humans lost in the bamboo forest. This place, it probably won't be long before it's deserted.