Touhou Soujinengi: Zansho

It's a normal day in Gensokyo when Reimu Hakurei notices a strange fog rolling in. All across Gensokyo, residents witness this fog weakening and killing a great many lesser youkai. At the behest of Yukari Yakumo, she joins forces with Marisa Kirisame, Sanae Kochiya, and Aya Shameimaru to investigate the fog's appearance...

Zansho (Lingering Summer Heat) is an expansion released at Comiket 79, 30th December, 2010. It introduces five new playable characters as well as new equipment, stages and quests. It also features new balance and skill animations.