4boys, animal_ears, black_hair, blonde_hair, blue_hair, brown_eyes, brown_hair, collar, demon_boy, demon_horns, dog_boy, dog_ears, dormouse_(yume-100), green_eyes, horns, las_(yume-100), looking_at_viewer, looking_up, lying, male_focus, mouse_boy, mouse_ears, multiple_boys, on_back, plums43, pointy_ears, red_eyes, riel_(yume-100), toto_(yume-100), yume_oukoku_to_nemureru_100-nin_no_ouji-sama