i know and almost all of them are difficult to get such as rens he has 4 and i know how to get the endings for yuri's and miu's like beating the maiden on top of the water is good for yuri but under the water is bad and for miu take at least one picture of miku for good or take none of her pictures for bad but rens are more difficult for the reason that they affect the story and he has 4 endings