I Became a Special Forces Soldier in Soldiers Sortie

I transmigrate into the TV drama Soldiers Sortie, a series I'm familiar with.

I only wanted to take it easy and make up for not having served in the military in my previous life.

But I just keep getting further and further from that laid-back path!

(I think military stories should be realistic, so this book has a fairly understated style. Please don't flame me if it's not your thing. Thank you!)