Trunks and Yumi had been together since they were little, Yumi loves trunks and see Vegeta as a Father she never had even though he's cold towards everyone he is a big softie for Yumi and Yuki (OC) [Goten X Yuki]. Yumi and Yuki both have dark magic powers, they are world singers and love to fight [their powers reached up to Lord Beerus's powers]. They'll be a slight Trunks x Pan and Goten x Valese.
13 parts