Disclaimer: Vocaloid? Not mine.

"Miku nee, did you see Len" Rin asked.

"I haven't. Sorry." The teal haired girl answered.

"Aww, I was going ask him to go shopping with me ." Rin whines.

"Speaking of which, where's Kaito anyway. Hey Rin, why don't we find them together?" Miku asked with a smile.

" Sure."

After 15 minutes finding

-Ugh, where could they be?_ Rin whines.

-S..stop! Too much Kaito!_ Rin and Miku froze as they hear Len's moan from Kaito's room.

-Come on Len, it's not all the way yet._ They immediately lean close to the blunette's room's door.

-Can't, ah, we wait until next week, uh._ Len panted with a pleading tone.

-Nope. You promised we would do this since last month. We had done this 3 times, and each time you back up at this point. I'm not gonna let you escape this time.

-But..ah..too…t..tight!_ Len hissed

Miku and Rin look at each other with wide eyes: What the hell is happening in there?

-Come on Len, quit being childish._Kaito chuckle.

-Childish? Have you ever been in my position?_ Len replied hastilly, clearly unhappy.

-Of course not. How weird is that? _Kaito said with a hint of embarrassment.

-Not much to me. If you want, we can switch our position, secretly._Rin and Miku could hear Len smirk.

Blood began to drip from the stalkers' nose.

-You won't be able to do it. Now brace yourself, I'm moving._Kaito said impatiently.

-No, wait, AGH! IT HURTS! PULL IT OUT!_Len screams desperately.

-Len, relax, it'll get better I promise.

-RELAX? HOW WOULD YOU RELAX? IT'S STUCK GOD DAMMIT!_ Len said furiously.

-Len, really, if you keep struggling like that, it'll leave red marks. You don't want such thing on your beautiful body, do you?

-…Okay I trust you._ Len said after a while.

- Thank you Len. I'll be as gentle as I can.

The duo could hear some clothes rustle.

- Now move._ Len orders.

-What? Are you sure?

-Yes, finish up already._ Len demanded.

- …As you wish.

-WAA! UGH.

-Are you okay Len? Should I stop?

-No, keep going.

- Just a little bit more…

-YES! WE DID IT! IT FEELS SOOO GOOD_ Len squeals in delight.

Rin runs to the bathroom as Miku grabs a box of tissue.

-See? I told you.

- Thank you so much Kaito. I'm very glad I could do it with you.

- Me too Len.

-It'll be humiliating if the girls caught us this way.

-OH YES IT WILL!

The door bursts open, only to review a blond haired demon with a red face (from embarrassment or anger) and blood on her nose, mouth, clothes. Sorry brother, she thought, you have broken my control.

-Rin?_ he asked confusingly_ How long have you standing out there?

She ignored him and keep her eyes wandering around. No clothes on the floor, no naked men, no sex smell in the air, no "milk",… She looked up to see a fully clothe Kaito and a Len-in-maid-dress.

-We though you guys were, um , doing inappropriate things…_Miku squeak uncomfortably.

-Doing inappropriate thing?_Kaito questioned.

-Forget about it. Were you fucking each other?_ Rin growled impatiently.

-What? What do you mean by that? What makes you have that thought?_ Len asked Rin while glancing at Kaito. But as soon as he look at Kaito's face, he recognize what the conversation can be mistaken as.

-WHAT THE HECK ? You think we… I CAN'T BELIEVE YOU PERVETS! _ Len said with his face flustered.

-Well?

-OF COURSE NOT!_Len screamed.

-THEN WHAT WERE YOU DOING?_Rin screamed.

Kaito sighed_ We made a contract since he forgot to buy me a present on my birthday is that he would wear a maid costume. But the clothes are a little too small so I help him with it.

-So that's what you mean by "too tight."_ Miku said with her face calmed down a bit.

- Yep, the same goes for "too much" and "all the way".

-How about the "positions" incident?_Rin asked.

- I'm just compliment how would Kaito looks on these clothes._ Len explained.

-And the "leave mark" thingy?_ Rin hadn't given up.

- If your clothes are too tight and you keep struggling, it'll leave red marks._ Kaito calmly said.

- I still don't think wearing this clothes are comfortable enough that make Len goes " it feels so good"._ Rin didn't get enough.

-When you have done something that is very hard, you'll feel like you're in heaven.

-Oh._Rin's realizes hit her.

-GOMENASAI!_ Rin and Miku bowed to apolozy.

-It's okay, but don't ever do that again._ Kaito said with a stern voice, and Len still has that annoyed look in his face.
-HAI!_ The girls said as they run out of the room, without forgot to lock the door.

-Glad they're gone now._ Len sighed with relief.

- Me too, it's not a nice thing if they're out there when we do part 2 of the contract, which is…_ Kaito said huskily as he pushed Len on the bed and climb on top of him_ please the master…

Whoop! I'm done. Took longer than I expected. At first I made Kaito a little stupid but in the end, he's the dangerous one. I figure you would like this kind of stuffs so please REVIEW if you have any question or just want to encourage me.

P.S: Sorry about the ending.

P.P.S: Vote if you want me to keep it M-rated or change it to T-rated.