Armed with a Cannon Fodder Script, I Marry a Black-Hearted Executive

[There's no blurb in the table of contents, so the site automatically grabbed the opening lines, which include character names and don't meet the site's rules. Changing each one individually might trigger frequent update notices. Sorry, sorry! I'll fix it all right away.]

At fourteen, someone who had abandoned his old name and wandered to Yokohama found a book.

In it, he didn't just read about the lives of countless versions of himself in parallel worlds. He also saw his own future, something he was never meant to see.

From that moment on, his life was set in stone.

He had witnessed tragedy and the misfortunes that lay ahead, but the moment he saw them, he lost the power to change the future.

He became a puppet on fate's strings, a butterfly pinned to a specimen board.

After countless attempts to change things, each one undone and rewound because it affected the future, he fell into despair. Then, at that moment, he met someone who wasn't controlled by fate.

After an encounter with danger, Mashima Aya, a low-ranking member of the Port Mafia, also found a book.

But it was a comic book, and he wasn't the protagonist. He was a disposable extra who died right at the beginning.

But he had a strong will to survive, so he started climbing the ranks. Unfortunately, his new boss was a young nutcase who spent every day trying to provoke him into getting himself killed.

His boss's boss was an even more devious schemer, who acted cute every day using his ability.

Mashima Aya held it in until he couldn't anymore. After sending his boss off to be reincarnated, he opened his eyes to find himself in his second life as his boss's boss, and his boss's boss's boss.

He thought he'd finally become the protagonist in his second life, but he was only a slightly more important stepping stone. Mashima Aya wasn't having it. He absolutely refused to be enslaved by fate!

In the end, he finally became the protagonist, only to find that being the boss came with his troublesome former boss and former subordinate as a bonus. No, thank you!

Note: The pairing is with a certain bandage-wearing man, but the romance will most likely be covered in an extra. Other characters may fall for the protagonist early on, but the protagonist will only return Dazai's feelings. There's a six-year age gap between them, so it's an age-gap romance with an older top.

(P.S. This is the author's writing-rehab story. Once I start, I'll update daily until it's finished. I haven't quite filled in the submission form correctly, and I haven't decided whether it'll go premium yet, so I've taken that part down for now. If all goes well, I'll sort it out in the next couple of days. The exact date depends on whether my form gets approved.)

Theme: Break free from the shackles of fate.