It looks like Misha decided to scare Hisao - who then suffered from Heart failure. Hanako - who was just passing through - saw this and got so angry she immolated herself. Reimu, who again was also in the neighborhood, took pity on the poor girls ashes and decided to take vengeance on the Evil Misha. Then Cirno arrived.
CID 258, posted on May 6, 2009: