Mystical Chain - Character Select Theme: choice!!
This is the Character Select theme from the fanmade Touhou game published by LION HEART, Mystical Chain
Originals: 恋色マスタースパーク / Love-coloured Master Spark
(Marisa Kirisame's theme, from 東方永夜抄 ~ Imperishable Night)
人形裁判 ~ 人の形弄びし少女 / Doll Judgement ~ the Girl Who Played with People's Shapes
(Alice Margatroid's theme, from 東方妖々夢 ~ Perfect Cherry Blossom)
ラクトガール ~ 少女密室 / Locked Girl ~ the Girl's Secret Room
(Patchouli Knowledge's theme, from 東方紅魔郷 ~ the Embodiment of Scarlet Devil)
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So, who're you gonna pick? The game works using a Master/Slave mechanic - you have two characters, and you can alternate between the two while playing. You're going to need to master this game play style if you want to beat Mystical Chain: most boss battles require you to alternate so you can dodge their patterns and hit them when they're vulnerable. It's pretty fun to watch, especially during the second boss battle..