When Sae was 9 years old and Rin was 7 years old, their parents introduce them to their first Pokemons, both had an eevee

A few years later, Sae leaves to become Pokemon master to accomplish his and Rin’s dream, a few years later, Sae come back while Rin’s training Eevee..

(Sae’s -> Umbreon, Rin’s -> Eevee/Espeon)