Magical Girl Lyrical Nanoha ViVid

Chapters 1-3 are the events that occurred between the end of A's and the start of StrikerS.

Chapters 4-12 are side stories about the characters.

Chapters 13 & 14 are the events that occurred after the end of StrikerS.

Chapter 15 is a special from Megami September 2009 (also events after the end of StrikerS).

The story appears to be centered on the investigation of the Book of the Silver Cross, an ancient Belkan magical tome. Tohma Avenir, whilst traveling, discovers a girl named Lily Strosek trapped inside a construct. When rescuing her, she gives Tohma an amulet that gives him access to a new Device power. However, unbeknown to them, there is another with a similar Device causing massive damage and injury, leading to an investigation by the Time Space Administration Bureau.

4-koma of Mahou Shoujo Lyrical Nanoha Vivid.