It's a sequel...
The main part is about Takao and his partner and how Takao almost get kidnapped by some yakuzas.
The second story is a part of a nice guy that gets dumped by his girlfriend because he doesn't love her romantically, he slowly starts to fall in love with a college student that he meats in the train. I like the second story, it's pretty cute.
Warudakumi Ni Mo Hana Wa Furu