Kang annoys So-hee again, and Ji-goo gets upset by a bad comment from a kid during her broadcast.

Turning 30, the trio can't drink as much as they used to. They come up with all sorts of tricks.

After a drunken So-hee kisses Kang, it turns out that something was going on between So-hyun and him.

Ji-goo and Ji-yeon end up going to the police station. So-hee goes to solve the problem after work.

The trio used to have ordinary jobs -- a publishing company employee, a nutritionist, and a teacher.

Ji-yeon is demoted to the dog farm. Meanwhile, Ji-goo strives to help her student Se-jin.

The trio visits the sashimi place and reminisces about their college dates.

So-hee's father suddenly passes away. Ji-yeon and Ji-goo visit the funeral to console him.

Ji-goo has a dinner with her family. Ji-yeon finds something special in common with her boyfriend.

So-hee's feelings about Kang grow, but she soon witnesses the intern going to his house.

So-hee and Ji-goo grieve for Ji-yeon, who has breast cancer. Soon, they help Ji-yeon fight cancer.