Yoona was handcuffed while she was sitting down on a chair, her midsection was wrapped with tape, forcing her to stay put on the uncomfortable chair, duct tape ontop of not allowing her to make any noise and her eyes were covered. She wanted to sigh, but she couldn't because of the duct tape on top of her lips, her friends had took this 'birthday kidnapping surpise' too far, as only 

"Is this some sort of sadomasoquist party? because I don't give those kind of services..." She heard a slightly deep voice say, something about the way that voice sounded made her think the owner of that voice was some sort of y beast and she knew it was none of her friends, in fact it was a voice it wasn't she had heard before, a shiver went up her spine as she heard it, though.

"No, of course not." Now it was Yuri' voice. "We just don't want her to run away from her gift."

Run away from her gift? What could her birthday present be that she would run away? 

Suddenly, she felt the duct tape from her lips was harshly taken off and her eyes were uncovered.

"Ouch!" She yelled while glaring at Sooyoung, Hyoyeon and Yuri, she wanted to touch her lips but her hands were still handcuffed to the chair. 

"Over here will be the key to the handcuffs." Said Hyoyeon with a smirk while pointing the counter that was obviously far away from her reach. 

"Yah! What the hecks going on?" She asked, struggling was once again, trying to release herself from the chair. 

"You'll see soon." She heard the y voice once again say, she looked around, only to find one of the most beautiful girls she had ever seen. And heck yeah was she right that the owner of the voice would be y, the girl that stood before her, next to some loudspeakers, dressed in a simple white shirt and a dress pants looking ready to slay anyone with that y body of hers.

She had read once on the internet those articles of clothing were fairly easy to take off, she shook her head, not really knowing why she thought that.

"Enjoy your birthday gift." Said a winking Sooyoung while pulling with her the pair of girls that had helped the tall one to kidnap her. 

She saw the y stranger lean down and plugged an MP3 player to the loudspeakers and After School's First Love started to play and the girl started to sway her hips to the music. 

Suddenly Yoona's mind figured it in a second then. 

y Stranger + Clothes easy to take off + y music + y dance = . 

As the girl in front of her started with ier movements, provoking all of Yoona's senses, she wondered for a second why would their friends think she would ran away from this. 

"Happy Birthday to me." She whispered as the clock struck twelve and the first article of clothing fell from the y stranger causing an unstoppable heat to take over her body.