The worsened quarrel

But as soon as it landed on his younger brother's face, Ji-Hoon regretted doing so but once an arrow leaves a bow it never returns. All three of them were shocked at his actions, Tae-Hoon's eyes had a tint of hurt in them, first, it was his mother and now his brother and he put his hand on his cheek which made Ji-Hoon more guilty of what he just did now, but it was too late for an apology and they heard someone's voice.

...

Hani was listening to their conversation outside when Dong-Hoon had called his brothers into his room. Se-Young saw her eavesdropping and went towards her. "What are you doing Hani."