• Book Name: Touhou - Aru Hana no Kenkyuu (Doujinshi) Manga
• Alternative(s): Touhou dj - Aru Hana no Kenkyuu; Touhou dj - Research on a Certain Flower; 或る花の研究
• Genre(s): Doujinshi Fantasy Mystery
• Author(s): Rireba (Circle), Nakatani
• Status: Completed Download Manga
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Summary: Marisa's efforts to understand the source of Yuuka's power lead into a complex research involving flowers and dreams.