Difficulty: you will die in one hit in all battles. Some bosses take 1 or 0 damage. Some will take the 999999 background or 9999999999 damage, but 9999999999 or 9999999 background of damage is a pixel of an hp bar. Your soul color is black, so it is invisible, you can't see it. The whole heart is pitched black. There are 7 battles. Sometimes, all battles do dodge. All bosses break all buttons, inventories, etc., even the 1st, 2nd, 3rd, and 4th walls, the ceiling, and the floor. The attacks are undodgeable, they ignore everything but the hp and kr. There is no route. You have to kill monsters, you can't act. Even with act, they don't accept it. No mercy. You can't spare, you can't flee. Everything (except for your hp and kr) are 0.