An unlucky cosplayer received a package of long, black, curly hair after a seller sent the wrong item. When she tried it on, she found it looked stunning and couldn't bear to cut it off. On a whim, she decided to cosplay as a gender-swapped Dazai. But just after finishing her makeup, she very unfortunately transmigrated to Yokohama...
Then something calling itself a System told her that in this world, Dazai had successfully joined the Port Mafia after being picked up by Mr. Mori. To keep the world from falling apart, she had to play Dazai Osamu and follow the plot. Once she finished, she could have anything she wanted.
Gender-Swapped Dazai: ...Interesting. There's nothing I want, but playing Dazai sounds like fun! Just send me home when I've finished the plot. I just want to see the literary greats with my own eyes, and then I'll have no regrets... Wait, then why did I actually become a woman?
System: ...Crap, there's been an error. It's too late now. Who knows how you ended up gender-swapped? I had already checked: you only decided to do it on a whim.
Gender-Swapped Dazai: So what now?
System: Anyway, just follow the general plot. Joining the Armed Detective Agency at the end should be enough. As long as you don't derail the main plot, do whatever you want. A gender-swapped Dazai shouldn't be too much of a problem... probably?
Gender-Swapped Dazai: It's not just no problem, it's ridiculously fun! I'm going to cross-dress as a man! Time to mess with... I've decided you're first, Chuuya!
Theme: Follow the plot with a bright, carefree spirit
