Broadcast media tvN's newest mystery thriller drama "High Class" aired its fifth episode on Monday, September 20.

"High Class" episode five highlighted the struggle of Song Yeo Ul's (Cho Yeo Jeong) struggles in fitting in with the elite mothers, as well as the secret that lies beneath the elegant facade of the luxurious school.

'High Class' Episode 5 Highlights: Nam Ji Seon Devises a Plan to Kick Song Yeo Ul From the School

To recall, Nam Ji Seon (Kim Ji Soo) devises a plan to kick Song Yeo Ul and her son from the international school. "I need to accomplish it before the semester ends. We can never let our children hang out with her kid."

On the other hand, Hwang Na Yoon (Park Se Jin), who was present in the spa day-meeting of the mothers as well as Song Yeo Ul's only friend and assistant warns Song Yeo Ul, "You must be vigilant."

While looking at the calm ocean, she continues to warn Song Yeo Ul by saying, "The dark clouds might appear and rain heavily. Don't be relieved. You never know when things will go wild."

With this, Hwang Na Yoon heads back inside the school.

Song Yeo Ul Joins Brunch With Nam Ji Seon, Hwang Na Yoon, and Cha Do Yeong

The poor Song Yeo Ul has been appointed as the legal advisor to the International School Parents Association.

Without a doubt, it is a tactic used by the most powerful mother in the school, Nam Ji Seon (Kim Ji Seon) to put pressure on her and her son Ahn Yi Chan (Jang Seon Yul) that will result in dropping out from the international school.

However, Hwang Na Yoon (Park Se Jin), who is her assistant and only friend, shocks her after she confesses that she also contributed to the plan to make them drop out.

IN CASE YOU MISSED IT: Park So Yi, Jang Seon Yul, Kim Ji Yu, and More Steal Attention With Their Youthful Charms as Junior Students in 'High Class'

Next, Song Yeo Ul is seen together with Nam Ji Seon, Hwang Na Yoon, and Cha Do Yeon (Gong Hyun Joo), together with the other parents of the international school.

All of them, excluding Song Yeo Ul, are enjoying the expensive and delicious brunch in a very relaxed manner, chatting and laughing at each other's stories.

However, Song Yeo Ul's evident awkwardness creates tension, like a calm before the storm.

K-Drama 'High Class' Sees Slight Dip in Viewership Ratings

tvN's "High Class" recorded a new low percentage in viewership rating in the middle of the Chuseok (Korean Thanksgiving) holidays.

On September 20, "High Class" plummeted to its lowest viewership ratings yet. After recording a high rating with its previous broadcast.

"High Class" received an average nationwide rating of 3% with its fifth episode.

'High Class' Episode 6 Release Date and Where to Watch

The sixth episode of "High Class" is scheduled to air on Tuesday, September 21 at 10:30 p.m. KST on KBS.

It is also available for worldwide streaming on iQIYI and Viu.

READ MORE: After School Kaeun Successfully Debuts as an Actress in tvN's Mystery Drama 'High Class' with Cho Yeo Jeong and Kim Ji Soo

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Written by Elijah Mully.