Youyou Kengeki Musou is a 3D doujin platform/slasher game. The player controls a half-human half-phantom Youmu Konpaku, a gardener and fencing instructor. She must defeat Reimu Hakurei as her mistress Yuyuko Saigyouji wants to check Youmu's skills. Youmu slashes various enemies (mainly fairies), jumps over obstacles and fight against bosses. She has several special powers (spellcards) to use.