Ki-joon, who lived alone with his younger brother Sang-woo, is worried about Hye-ran, who was the mistress of his father who died in an accident not long ago. Hye-ran had no place to go since their father’s support had been cut off. She had no plans to move away and Sang-woo is into her. Meanwhile, Hye-ran is not satisfied with her sexual relationships with Sang-woo and she is worried about Ki-joon’s mind.

Brother's Girl

Hye-ran, who had tutored at Yeosu and her home, said there was something left behind. At the request of Yeongsu, he will additionally help him study.

Extreme Lesson 2

Defendant girlfriend break up the wind, but get abused at work 'paper'. Accidentally discovered in bags of cash to 50 million won. Had trouble holding the money at the end of every trip to the end he left, hitchhiking the midst of a 'coins' in the car to be traveling with them. Dangchan traveling in attractive 'coins' to fall 'paper' to make sex with her​​, but the destination of 'coins' to drop off a bag of money and then find that the two missing. Eventually she found 'paper' is put up in their dajjagojja thief known only to her, Bonnie 'coin' and find the lost bag of money gave his thanks to know that. But gradually 'coins' will return the identity of a little more than give him the money.