Any person that had listened to a high-pitched singer before would know that a well-sung high-pitch would have a strong piercing ability.
Kaede's high-pitched singing displayed such a piercing ability as well, making Seiji and the others feel like their ears were being pierced through.
'Amazing, nee-san.'
Seiji was inwardly exclaiming at her performance.
After her part was finished, it was his turn again.
He instantly regained his senses and continued singing conversationally.
Meanwhile, the Amami siblings were still all in a daze. It took several seconds more for them to recover.
Hoshi had an impressed expression of "that was amazing," while Rion and Kotomi exchanged awkward glances with each other.
After a few lines of Seiji's conversational singing, the joyous music reached a climax, and it was the female singer's turn again.