They are in the same age of 13, nicely by chance. Madoka-chan gave birth to six babies while Mikan-chan with none. The former is a horsey while the latter a kitty. They will never see each other, living in all different environment. However, they share a lot in nature; sensitive, smart, shy and lovely. And their job is similar for Mei-Shun: they give great spice spread onto her life, with exciting celerity outdoors by the former while heart-warming relaxation indoors by the latter.