【023】Black-Skinned Sports | White-Skinned Muscles

One dog is a second-year black-skinned sports student; the other is a white-skinned teacher with fat-wrapped muscles. Role reversal happens only at daddy's command. On Teacher's Day, they obtain each other's essence.
One is a black-skinned sports student in his second year, and the other is a white-skinned teacher with a muscular build.
One dog is a thick black-furred sports student, and the other is a white-furred, greasy, muscular teacher.