[Touken Ranbu Crossover] I Cosplayed My Way Into a Curse

Most of this is Touken Ranbu. 1. The protagonist cosplays as Kashuu Kiyomitsu, but he's human!!! The protagonist's appearance changes from 3D to 2D, making him look very much like Kiyomitsu. The protagonist isn't anyone else, and won't become anyone else. He'll always be himself. 2. The protagonist is straightforward and easygoing. He can accept love normally and return it in kind. He's optimistic, resilient, strong, and a handsome little guy~ 3. I'll throw in all kinds of random memes, including bad ones, along with my own questionable sense of humor and dark jokes. Feel free to skip the author's notes. Got all that? Go! Hello, we're pure love... Ah, no, sorry, I borrowed someone else's line. Hello, I'm a transmigrator. First of all, I solemnly declare that I transmigrated with my whole body. The sword warrior I became is named [Kashuu Kiyomitsu]... Probably because after my face changed from 3D to 2D, I looked a lot like that kid... I woke up one day and my eye color had changed. Doesn't feel quite right, does it? Next, this is my Spirit Master, the person who cursed me... Fine, she's my Spirit Master Mom, the one who cursed me. After transmigrating, I just wanted to quietly grow stronger, but fate had other plans. With a "biu," I landed in a Dark Citadel. And I was the sword warrior summoned for the first and last time by the innocent Spirit Master who had taken over the Dark Citadel. Heh. The more fate treats me like this, the more I'm going to punch it in the face! I gained strength through my own efforts. Then I was taken to the black market. In the end, I plowed through the black market in the literal sense. There's not much to say, but that's what happened. (Laughs.) This world has "darkness" in it. I know that for certain. After I returned to the netherworld citadel, I took my Spirit Master with me when I underwent my final evolution. Rather than let my mom-like Spirit Master spend her entire life stuck in the citadel, I figured it was better to take a chance with her and gamble with our lives. Although no one had ever taken a Spirit Master along for a final evolution before, I managed to find a loophole. And I won the gamble. My Spirit Master lived a happy life. When she died of old age, she cursed me. Then she immediately lifted the curse. I watched her hurry off to be reincarnated, leaving me a cheat skill as she went, and I was speechless. People who love the future will be rewarded by the world, right? I've always been the kind of person who takes things in stride. He will move ever forward. He will fear nothing. He will rise, little by little. Theme: Xiaolüjiang, stop blocking me. I give up