Tyranical Diapered Tyrant of Love
 

Guri, the cosplaying Cupid noticed a new book appeared on her desk. Not just her Kiss Note but a bright baby blue notebook with the words Diaper Note written across its cover in what looked like baby blocks. "What on earth is this?" she asked herself, opening it to the first page.

"Well, one way to find out." she mused idly, writing her own name in the book, and the magic took hold instantly. Her underwear grew thicker, softer. When she took off her PJs, she saw her normal panties were replaced by a diaper, one decorated in her trademark Shinigami cosplay theme, cartoonish skull prints across it. "Oh, this is so cool!" she shouted, finding the sudden change interesting and not at all awkward. Pretty hard to be embarrassed when she was in a virtual harem where all the girls were in a relationship bound by the Cupid's magic "Wonder who would like it..." she asked herself before writing Yuzu's name into it next to her own.

Yuzu was sitting at home daydreaming about Akane "Oh, Akane. One day you'll be mine and mine alone." She said looking at the picture she always kept next to her bed. Seemingly without warning she felt her underwear grow bigger, "Huh?" Yuzu said in confusion as she didn't like the thought she was having. She looked under her skirt and to somewhat expected there was a diaper, already yellow tinted, not from wetting that was just the color. "What the heck!? Why am I-" she cut herself off thinking of possible reasons this could've happened, she blushed holding her skirt down even though no one was around. The first thought that came into her mind was that Guri probably had something to do with it. She looked in her closet for something to potentially hide the padding and put a pair of shorts on under her skirt, the diaper buldge still very apearnt however.
She went outside and started marching straight twords Seiji's house, where she knew Guri would be. Luckily he was out of town at the moment.
She had to get this solved before Akane saw her like this

Guri was currently waddling around her room, quickly adjusting to the diaper. With Seiji and Akane out for a while, she had absolutely zero shame, leaving her diaper exposed, wearing only a shirt in addition to the padded garment. She looked out the window and saw Yuzu approaching and ran to the door to meet her friend, the Diaper Note still in her hand as she opened the door for her.

Yuzu quickly knocked on the door and crossed her arms pouting as she tried to pull her skirt down some more trying to cover the Diaper. She only now realized that she hadn't even attempted to take the diaper off. She just rushed over here to blame Guri. Really shows how much faith she had in her. That though made her feel a little embarrassed, after all Guri may not be to blame, for all she knew it could've been Shikimi or someone else

Guri opened the door and pulled Yuzu inside before closing it behind the. "So I see that it worked." she said, grinning when she saw the girl was diapered just like her. "So, do you like it?" she then asked excitedly, hoping Yuzu appreciated the change of underwear.

"So you where behind it." She said "No I don't like it! Why would I want to be in Diapers?" She said still blushing "I'm not a baby and I don't want Akane to see my like this, so get me out of it." She said, not wanting to admit to not even trying to take it off yet.

"Did you try to take it off yet?" Guri asked, a little hurt that her friend didn't appreciate this. She had already read the rules and it said anyone who's name was written in the book would be unable to take off their own diapers, and it was something she tried before Yuzu came over. She just wanted to see the girl try for herself.

"N-no...." She said blushing, feeling foolish for getting caught "I mean I just magically appeared on me. Why would I assume I could take it off." She said with her face bright red. "W-wait why are you wearing one too?" She said sounding confused about why Guri would want to be in a diaper

"I wrote my own name in this as a test." Guri replied, showing Yuzu the Diaper Note. "Once I found out what it did, I thought maybe you'd like it too and before I stopped myself, I wrote your name down."

"Why would I like this? It just feels so weird..." Yuzu said, actually taking a second to feel the padding on her and realizing she didn't not like the way it felt, other than that extra bulk nothing was wrong. It was mostly just the thought she was wearing something for baby's "Wait so you wrote your name in that thing without reading the rules? What if it took away Control of your-" Yuzu stopped herself as a horrified look went over her face "That thing won't make us.... You know.... Will it?" She asked blushing