课外授业：即将成熟

Eun-ji is a idol trainee who gets abandoned by Jin-tae her sponsor, so she heads back down to her sister Sun-yeong's home. Her first love Joon-hwan is now her brother-in-law so he welcomes her but Sun-yeong treats her like a child and worries that Eun-ji might go down the same path she did when she gave up becoming an idol. Eun-ji and Sun-yeong quarrel often and Joon-hwan comforts Eun-ji every time. Eun-ji starts to depend on him and he also secretly tells her why he quit his job. One day, Sun-yeong goes on a business trip for a week but before she leaves she tells Eun-ji how sorry she is. They share a momemtum with two wooden dolls. All alone by the two of them at home, Eun-ji tries to embrace Joon-hwan's heart by showing him a scrap note she made of his articles. He is grateful for Eun-ji and starts to open up to her. The two of them cross a line that shoud never be crossed and as time goes, they fall deeper and deeper into each other.

Painter Ha-rim became blind due to an unfortunate accident. His wife Sun-yeong searches far and low for a cornea donor until she meets terminal cancer patient Dae-geun. These two make a startling and dangerous deal for Ha-rim's cornea.

A sly gangster hatches a plot against his own wife, who works at a brothel-cum-bathhouse, with the help of the bathhouse owner’s wife.

Summer is almost over, but Ga-yeong who gets hot, suffers from inconvenience due to the broken air conditioner. The repairman is already fully booked and Ga-yeong is looking for someone to fix it right away. At that time, she made a reservation for a suspicious service at the store that Da-hyeon recommended the first time. There's a tremendous thing waiting for Ga-young, who will meet the driver who came from there...

Do-min goes to get money from Bo-yeong and falls in love with her. However, Do-min should not be caught. Bo-yeong is just something he has to breed. Do-min raises Bo-yeong, but his heart does not stop for her. Bo-yeong, noticing other people's feelings, started to read them in order to escape from slavery. Bo-yeong, along with Jun-ho, succeeded in rearing the people after many twists and turns, and tried to escape from slavery using the people, but was blocked by Seong-hee. Seong-hee tries to sell Bo-yeong and Jun-ho to Do-chool, and Bo-young tries her best to overcome the crisis. Bo-yeong and Jun-ho finally succeeded in defeating Seong-hee. Bo-yeong enjoys her success by taking revenge on Seong-hee and the people, but is attacked by Jun-ho. Bo-yeong is again strategized as a slave by Jun-ho.

The girl of a webtoon author's dreams has moved in, but she is his friend's girlfriend. When his friend leaves for work, the webtoon author and his dream girl are left alone.

Jeong-hwa has sex with various sponsors to maintain her popularity in the show biz where sexual favors are a must to survive. However, her schedules get cancelled while she goes out giving more sexual favors. Then she meets Yuni who became a celebrity because of Jeong-hwa and she tells Yuni what to do to survive in the show biz...

"Junai" is a bar run by Okama's mom and is crowded day and night with male and female couples and gay men. The Miss Pure Love Contest is scheduled to be held soon, and Yamakawa, a regular customer who is obsessed with Kimitaro, an employee of the store, boasts that Kimitaro will be the one chosen again this year. Kimitaro, who had an early shift that day, left Goro, his junior, to handle the rest of the customer service, and got into the car of his girlfriend, Yukio, who had come to pick him up. The two went to see the sea at night and kissed in the car without paying attention to the people around them.

Who's going to let down their guard first? A pretty art tutor VS a muscular and young personal trainer? This sex-less couple's secret tutoring starts now between a pretty art tutor VS a muscular and young personal trainer. Baek-seon and Soo-kyeom are sex-less couple who have been living with each other for 20 years out of loyalty. The two decide to find a hobby for some fun in their lives. Soo-kyeom decides to get personal training and Baek-seon decides to get some art tutoring. Oh dear, they meet handsome and young personal trainer In-hak and pretty art teacher Ji-won! The couple is soon more interested in getting action than getting lessons. What will be the end of their secretive lessons?

Campus couple Sang-yeol (Kim Myeong-joong) and Mi-na (Lim So-mi) are a married couple who maintain their living as a magazine reporter and pretty famous writer. Sang-yeol, who is always at home writing, has been in an affair with his neighbor and collegemate Da-yeong (Hwang Jeong-ah) for quite a while. Then one day, Mina runs into Da-yeong and exchanges phone numbers. Mina starts to suspect the frequent phone calls to her husband from an unknown number. She finds out Da-yeong is the one he's been cheating on her with but she isn't upset. Da-yeong's husband Hyeon-woo (Lee Hyeon-gook) had once dated. One day MIna meets Hyeon-woo coincidentally through work and seduces him. He falls for her and the complicated relationship begins...

A militant revolutionary group is torn apart by betrayal as its members descend into paranoia and sexual decadence.