Was Gin Actually the Biggest Undercover Agent All Along?

Mainly follows the bottom, and it's basically all sweetness, with a 100% happy ending. The ending is open, with bonus stories featuring different characters. I have a special fondness for Gin. Gin is the best. There will be an original character lending a hand (if that's a dealbreaker, proceed with caution), and Gin is absolutely dreamy. Gin has an original backstory, and a red alert: he has a younger-sister complex!!! I really like the way his sister is written, of course. She's basically his golden finger. Gin's fellow Organization higher-ups are also part of the story. This is my take on Gin. Be cautious if you don't like out-of-character portrayals!!! Gin is younger here. It's not that I dislike older men!!! I've written plenty of adorable characters in their thirties and forties!!! Since he's pairing up with younger characters, and to keep the high schoolers at 17, Gin is set as 24 in this story. Sorry, I just want everyone to love Gin. He's had such a rough time... Of course, that's later on. Shin-Gin, Akai-Gin, Amuro-Gin, Scotch-Gin, Hattori-Gin, Hakuba-Gin, Kaito-Gin (the last three are crack pairings; they have no connection whatsoever in canon!!!!) Part One Everyone wakes up to find themselves on a deserted island. But... why is Gin mixed in with a bunch of people from the protagonist's side? So why is your hand, Gin, tied to Shuichi Akai's?! What's going on... Are we somehow starting a survival game again?! Gin (expression icy): No. Let me out. I don't want to be stuck with a bunch of death gods and undercover agents... This Gin doesn't seem like the one they imagined? Part Two The Organization falls. Everyone: Where's Gin? Gin (quietly taking all the credit): Kicking the Organization's ass is so much fun. Part Three Nothing but sweet moments and romantic rivalries. Sweetness mode: on! Toru Amuro: My lover is this country. Everyone: Waiting for him to eat his words.