Touhou: Lost Legends (TH:LL for short) is a Touhou famgame in a modified danmaku play style. The story is as follows:

"One week ago, Reimu Hakurei and Marisa Kirisame set out to investigate an incident affecting the land of Gensokyo. Spirits were coming from seemingly nowhere and, after a week of not hearing anything from them and the incident still in full swing, you, Rin Satsuki, and Genji, a turtle who you are the caretaker for, decide to leave the tranquility and safety of the shrine and investigate..."

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