Actor Jung Bo Suk, who performed in "Highkick2", appears as a cameo in Episode 84.
Jisuk appears about 30 seconds with a very important message to Jungsuk about Jiwon's having already completed her volunteering tasks.
[AGB Nielsen] Nationwide: 14.0%
Seoul Area: 15.3%
[TNS Media] Nationwide: 13.3%