Prologue and rules of the game

　　Heere we go! 　　Hello there, oniisama. 　　Welcome to the sister's toy box. Nhihi, oniisama sure looks surprised. 　Nfufu, sure is. This must've been a surprise. Say, Ria-chan We can do with this anything we want? 　Of course, Shia-chan 　I told you, this belongs to us now. Nhihihi, then let's play lots with it. But let's not be as rough to it like the last one. 　That's what you always say, Shia-chan. And then you break them right away. 　Nfufu, even if I want to break it myself. Oh noo, ria-chan is scary. 　That's what you say, shia-chan. Anyway anyway, and it's the first time we had a human for a present. We can have so much fun with this. 　Nfufu, Shia-chan and her intrigues again. 　Oniisama will also be quite happy. Really seems like it. Of all things, that's what you'll get from us. 　Hmm?What's going on with you? 　Don't struggle that much. You can't run away. Nope, you can't just run away as you please. We'd never allow such a thing. 　Ah, speaking of, we haven't introduced ourselves yet. Oh, you're right ria-chan 　Where are our manners? Oniisama, I'm shia. 　Oniisama, I'm ria. 　　Nice to meet you. You see, oniisama has become our toy. 　Hmm? What do we mean by that? Hey, Ria chan, you sure this toy isn't an idiot? 　Absolutely he is, how many times did we say "toy" now? You hear? Oniisama's now a pitiful creature, meant to be played by us. 　So we'll be carefully mess around with you until you break. Nihi, what's that? You don't want that? 　This is hopeless. He's a real idiot. We just said you are our toy! You don't want that? 　You better obey us, oniisama. 　Shia-chan can be quite scary when she gets angry. That's right, better cut it out. We should bringe some sense into this lowly toy. For example, teae it until it cries a fountain. 　Ahh, now you made Shia-chan angry. 　Keep this going, she'll tease oniisama until his head gets completely messed up and insane. 　It can be dangerous when we don't forgive. Oniisama. Nhi, that's right, you should've been obedient from the get go. In that case, we could've tenderly loved you. 　So there, you must swear absolute obedience to us two. 　You must follow all our orders, like a good toy should do. Oniisama must devote himself to us completely. Or we'll change how we treat you in a whim. 　Allright? Oniisama. 　You have to do what we say, or else I'll mess you up. 　Oniisama, you better watch out what we tell you next time. Aaah. This time Ria-chan is the scary one. Nihihi, that took a while. 　You useless toy. 　Hey? You want me to mess you up until you die? If she says sucha thing, Ria-chan definitely won't stop until you're dead. Oniisama, you better get your act together. Strunggling like that won't help you anymore. 　Nfufufu, you're devoted to us now. 　I got a bit carried away. 　Because oniisama's good ant making me angry. Now then, with this, oniisama is our's 　Nfufu, but let's make sure just in case. Nihihi. 　Nfufu. Shia-sama 　And Ria-sama 　　I have become your toy! Go on, say it. 　Quickly, we wanna hear it. 　　Go on, do it! 　　Nhihihi 　　(NFufufufufufu) Hey hey, did you hear that? Ria-chan? 　Yeah, sure did, Shia-chan. He said, Shia-sama. 　And Ria-sama. Sounds nice. This toy just called his juniors "sama"! With this, we can finally do whatever we want with it. 　Sure nice how we made him so desperate, but also pretty pathetic. 　But oniisama said it himself, so maybe he likes it? Now then, let's play with him right away. 　After all, this is our first male toy. It's strategy time. 　Let's come up with an interesting game. 　　Good evening, Oniisama. Hey heey, have you been waiting for us? 　Obviously. After all, WE're going to use him. All men like pervy playtime, don't they? 　Every linging creature who has a dick would love it. Well, then let's annoucne: 　What we're going to play. 　　Heeere we go! 　　The ejcaulation patience game! The subject of the game is very simple. 　Even an idiot like oniisama can understand it, so no worries there. From this side, I will bully oniisan's dick. 　From the other side, I will make oniisan hang on. If you cum, the cumming side wins. 　If you hang on, the patience side wins. 　　That's super easy, right? The cumming side will touch oniisama 's dick and urge him to cum. The other side of course can also tease your dick if she feels like it. 　The patience side will speak words to him that urge him not to cum. Also, the cumming side can made to stop teasing it just a bit, according to her favorite timing. 　But only the dick. Eh? Well, and when does the patience side win? Is that what oniisama thinks? 　Eheheheh, every time he likely to cum, I can tell you to stop. But not like you think. 　That's where the game gets interesting in the first place. Nihihi. 　Nfufu. What is it, you wanna know more? Hey, you wanna knoow? 　Shia-chan, now what? Should we tell him? I don't think we should, Ria-chan. 　For sure, Shia-chan. 　　Giggle giggle. However, we forgot something very important. Y'know, we both really hate losing. 　Yeah, we totally hate it. 　We're hardcore sore losers. That's because, if one of us loses, we'll never forgive you. 　Still, we're such intimate twins, so we never fight between each others. 　Instead, we'll let out our frustation on oniisama. Our anger will go all to you, oniisama. 　For that, the patience side thought up a nice punishment game. It's a good diversion when shenloses. 　Does the cumming side have its own punishment game? Nhihihi, nah she really doesn't. 　I mean, it's impossible for the cumming side to lose. Ehh, do you want me to win? 　That's on your mind? Nah. 　　I said don't worry about it. 　　Just be quiet like a good toy. Nihihi. 　Nfufu. Well, good luck not making Ria-chan angry. 　You hear what shia-chan said, so do be careful. 　　Don't make us angry. And now, the cumming side, 　and the patience side, announce the game!