Wait so Jun's soul and Luisa's aren't the same? So as Marcus' and Graham's??

Jun and Louisa's soul are the same, which is why she had to choose at the end, but the the goddess said that time flows differently in the different worlds and that she can hold on to souls as well, so Louisa lived a full long life with Graham and then reincarnated in the other world as Jun to be with Marcus.

Ooohh okay okay thank youu♡♡