I had my phone out and the mirror suddenly reminds me of a gacha game I play. It's called Mirror Babe. It's about a mirror that appeared before a random person and they have access to possess waifus with many powers. They learn to use their powers and bodies as they keep on playing and finishing missions. Growing through the mentoring of said waifu and from the mirror commander who offered the mirror to begin with. The gacha part was based on collecting memory fragments where the player must have a good understanding and the true name of the waifu before they could have access to them as well as more fragments to power them up.
As for why the waifus were the way they were, they were fragments of warriors in the past or fiction. Memories or legends that gave them form but they needed an Avatar to give them form. Even without control, their purpose was to bond with someone and pass down all they knew based on their fragments.
I decided to pick my waifu and my build. Hoping it worked like in the game.
"Miyamoto Iori, Memory Fragment of Niten Ichi-ryū," I said. I got to say all of that since the game needed the avatar know that term. Also gotta include the weapons with their complicated names and rituals.
The mirror started shining unlike before. I knew it! The mirror is just like the one in the game I played! Before me then showed the disembodied head of a lovely girl with silver hair tied up in a stylized Japanese ponytail with lots of accessories. Something about her looked tough but pretty calm. I thought that the head would not include accessories since my grandpa's head did not have his glasses or hat. A bunch of swords and armor circled around the head. Now it looks like the character customization menu.
"I wonder if poking her would get her to talk?" I said before doing so.
The head slowly opened her eyes and smiled suddenly. "Ah. You must be my Avatar. You even got me some weapons! Thank you so much!"
"Whoa! What is going on?" I asked.
"Oh right! This mirror is the real deal. It's Mirror Babe but in real life! To think someone else besides a company member called me forth. Specifically me too! Not the mascot girl!" Iori said.
"Wait, how are you talking when all the other heads can't?" I asked.
"Well I'm a Mirror Babe and they are not. Duh. And besides, the best you can do was to exploit their memories and probably possess them. Now if they were dead, you can do a lot more since they are kind of fragmented..." Iori explained.
"Okay, your special," I said. "Really thought this is a regular possessing story."
"Trust me, if it were, it would be the same as every possession story. You get someone's body and you do stuff. Maybe it gets sexual," Iori said.
"Point taken," I said.
"Now then, I'm ready for you to take over," Iori said.
"Okay!" I said as I jumped into the mirror.
...
I woke up in a grass field with an odd feeling. I looked around and saw nothing for now but realized that I now have breasts. Not only that, I wore a kimono of sorts that was not restricted with a skirt and was stylized for combat. I had some armor on my shoulders and joints with katanas on the side. It's official, I became my waifu. I'm gay but I'm my waifu!
"Damn I'm sexy," I said as I wanna touch my boobs.
"Hey there!"
"Whoa!" I said as I took my hand off.
"Hey! I never said stop!" Iori said as a floating head next to me. "Come on, have as much fun as you want! We both get the pleasure."
I remember in game that Iori was often a chill and cheerful waifu. She's also kind of perverted and likes her breasts to be touched. She both find it sexy and a compliment. As for the floating head thing, she's sort of my Navi from Zelda and it can be cute.
"So then Avatar, what shall we do?" Iori asked.
...