Ah, it turns out that he meant only to help at the salon. In fact, that's not what Sis Mince discussed earlier.
Sis Mince pouted because Jangjun didn't understand the code.
Jangjun began to feel the aura of disappointment emitted by Sis Mince. So, before Sis Mince changed hia mind, Jangjun immediately approached the window, where various models of wigs and different colors were displayed.
Jangjun chose a long wig with straight bangs and a dark brown color.
"Borrow it first, Sis!" said Jangjun while inserting his wig into the black crackle. Sis Mince got angry because Jangjun put the expensive wig into the crackle. But, Jangjun rushed to leave first.
Jangjun just walked away, before he was teased again by Sis Mince, and asked for strange things.
***