my opponent activates return of the six samurai and selects irou. I chain to return with enemy controler and tribute one of my monsters to take control of her yaichi. the field now looks like this: she's got a irou that will be destroyed at the end of the turn and I've got her yaichi that will return to her control at the end of the turn. Now my question: what happens first in "the end of the turn". Does control of yaichi switch back first or does irou get destroyed first? It matters because if yaichi switches back before irou dies than my opponent can decide to use the samurai's substituting effect so that not irou but yaichi dies.