Modeled using koikatu. Koikatu! (コイカツ！ in Japanese) is an eroge created by the Japanese H-game company Illusion.
Using this game, once the character is created, in his character studio, you extract the model using ninja ripper and then convert the meshes with noesis into an editable blender format. (collada, obj etc..) Prior to that in the character studio you assign the pose you want.