Tells the same story as Full Metal Panic Second Raid and is as such, also based on the novels The End Of Day By Day. Leaving off after the original series, this series tells of Sousuke and Mithril as they fight Amalgam. Like the original series, but both sides have gotten a bit more aggressive...

A sergeant by the name of Sousuke Sagara is assigned an important task. That of guarding high school girl Chidori Kaname. Sousuke is a military genius, gaining high rank at an early age, but because of his strange upbringing, he lacks social skill. Now, he finds himself as a fish out of water as he attempts to protect a girl from an evil organization and turn in his school work on time. (Source: Anime News Network)

Basically, it's a retanking of some chapters from Full Metal Panic!. It's sort of like FMP! Fumoffu.. meaning that there's no mecha plotline, only short stories. Also there's an extra story not presented anywhere in each volume of this series.

It's been twenty years since that fierce final battle...Sousuke and Kaname are husband and wife, as well as loving parents to their children, Nami and Yasuto. A life of peace and quiet...is the last thing you'd ever see from this family! When you have parents like this, every day is bullets and bombs galore! (Source: Yen Press)

Kanie Seiya, a genius with both looks, intellect and athletic ability is suddenly threatened on a date to a park by the new transfer student. Turns out, the park is run down and the princess managing it wants our narcissistic main character to take over and save it! By the author of Full Metal Panic!

Two sisters reunite after a long time.

The younger brother waits anxiously at his parents' house for his older brother's return, accompanied by the latter's girlfriend whom he's meeting for the first time. However, he notices something amiss—sweat beads on his brow, and he struggles to catch his breath. The cause? She's not what she appears to be.

Five years into our marriage. No children. Separate bedrooms. Everyday life feels dull. One day, my husband brought home a present. He said it was a gift from one of his subordinates. I used to love exchanging presents, so I started looking for a suitable return gift...

As a stickler for rules and a knight with the highest regard for honor, Sigrid believed her loyalty would be unswerving and true... until she is killed by the liege she serves. Just when the guillotine's blade hits her neck, she wakes up to find herself five years before her execution. With a second chance at life, Sigrid swears to change her old ways and avoid her wretched fate. Unfortunately, she soon discovers that shaking off her past may not be as easy as she had imagined... (Source: Tapas) *Note: Includes 25 extra chapters.*

Shyla accepts an arranged marriage to escape her father and travels to the North, only to find that her legendary Black Wolf husband is a prickly little pup who can't even take human form! With Calleon intent on chasing her away, Shyla must stand her ground to achieve her goal of becoming the duchess. (Source: Manta)

Sagara Sousuke isn't your typical high school student. He reads military enthusiast magazines; he responds to questions with "affirmative;" he brings grenades to school in his bag. Though everyone at school takes him for a hopeless military geek, Chidori Kaname thinks there might be something more to him. When their plane is hijacked in the middle of a field trip, Kaname's instincts will prove correct: Sousuke is an elite, mech-piloting mercenary... and he's here to protect her! (Source: J-Novel Club)