Jujutsu: From the Naruto Training Class to the Culling Game

Lu Kai is an old fuddy-duddy left behind by the times. He transmigrates into the world of Jujutsu Kaisen, a series he has never watched, and becomes an "ordinary Tokyo resident" destined to get caught up in the Culling Game. Then he awakens a seemingly useless Konoha Training Class livestream System. The problem is, Lu Kai hasn't even watched Boruto... What can he do? Does he have to rely on a few ordinary cosplayers who livestream influencer dances to elbow their way to victory in hand-to-hand combat, while saving his own skin along the way?