While Boruto and the others are forced to participate in Ouga’s experiments, Sarada and her team investigate Boruto’s disappearance and discover the existence of a suspicious individual. 
Meanwhile, Boruto is shocked to discover the identity of someone who may be working for Ouga. Just then, a test subject is found dead—killed for reasons that have nothing to do with the experiment.

The sorrowful voices
of the people I murdered.
.أصوات الناس الحزينة الذين قتلت
Darunter sind die
Schmerzensschreie der Leute,
Las voces de aquellos
a los que les arrebaté la vida.
Las voces de aquellos
a los que les arrebaté la vida.
Quelle delle persone che ho privato della vita.
As vozes tristes dos que matei.
Полные сожаления
 голоса тех, кого я убил.