Chapters 5-7 (Normal)

Chapters 5-7 is an achievement/trophy in the first Bayonetta game that is unlocked by completing Chapters 5, 6, and 7 on Normal.

Description
"Complete Chapters 5 through 7 on Normal difficulty"

Guide
Just beat chapters 5, 6, and 7 on Normal.

Here's the wiki Walkthrough:

Chapter 5

Chapter 6

Chapter 7