Hikaru felt like falling into the lake. He didn't have time to stabilise himself due to the shock he received from his "past life", before Vuni shocked Him again.
In fact, he wasn't thinking as much as Vuni had thought, it was just that his mind was a little slow in absorbing all the information. That's why his reaction was slow.
However, he did not think that Vuni would give him a second shock. Maybe Vuni knew that his life was too peaceful right now, so she decided to stir it up a bit?
Are you kidding me?
Hikaru didn't know how to react. Was he Angry? Anguished? Or Sad?
No, Hikaru didn't know what his previous life was like but he thought that if his previous life didn't die, he wouldn't exist either.