My version, no Mona Lisa in here. Sorry if it sucks, I tried but it didn't turn out the way I wanted it to, but Im gonna post it anyway. Hope u guys like it. Based on episode 2 of season 4 of TMNT 2012. Enjoy!
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The Triceratons had opened the black hole, and the entire planet Earth was sucked into it and was no longer there. Somehow there was this space ship with a white robot that had saved the turtles, April and Casey just right before the world disappeared. His name was Fugitoid and he was not alone in the space ship. He had one more girl in the ship, and her name was (y/n) (l/n). She was helping Fugitoid to save the turtles and their friends.

Then Fugitoid had done something so they could go 6 months back in time to try stop the Triceratons before they open the black hole all over again and make Earth be gone for good. Ever since they turned back in time there have been adventures and action going on. Right now we was face to face with tons of Tirecaton ships, and they started shooting at us.

FUGITOID: Everyone stay seated! We have been shot and are going down on an emergency landing!

CASEY: No shit, Sherlock!

Everyone sat down in their seats, but Raph grabbed (y/n) arm and made her sit down with him. Ever since he laid eyes on you, he have been more nice, more soft and less anger issues. It was like you tamed him, and he had fallen for you. And he fell hard in love with you.

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You and the rest of the team had found the Triceratons spacemine which had the metal you needed to fix the ship. As for now you all was being chased down by several major ice dragons. You tried to run as fast as you could, but fell on the ice.

YOU: Ow!!!

You shouted as you fell and twisted your ankle. Raphael stopped immediately and saw you laying there in pain. He ran to you.

RAPHAEL: Oh no, (y/n). I'm gonna carry ya the rest of the way! Ain't leaving ya behind!

He picked you up bridal style and ran with you in his arms. Casey gave his explosive hockey pucks to Donnie so he could use them to stick them in the ice and make it explode. When all was set, they had to run like crazy to get as far way from it as possible. Then the ice dragons was dead. Now the turtles, April, Casey and you started to feel faint due to low heat and oxygen was coming to an end. Fugitoid had a lot of pressure on him to fix the ship fast so everyone could get inside and charge their suits. As for now you and Raphael was sitting next to the spacemine almost fainted.

RAPHAEL: (y/n)... I need... to.... tell you..... how I feel...

YOU: Raphael.... believe me.... I know...

Then the two of you fainted next to each other your head on his shoulder and his head on top of your head again.

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After a few hours, you notice Raphael start to wake up.

YOU: Raphael. Raphael!

RAPHAEL: (y/n)?

You was standing, but Fugitoid had given you crutches. Raph came up and stood beside you. You dropped one of the crutches and put your hand in Raph's hand which made him smile widely. Then Raphael and you leaned in to kiss. As you was an inch away from each other, the door behind you and Raph suddenly opened and Fugitoid came in interupting.

FUGITOID: Alright, no time for cuddling, I don't mean to be rude but we do have Triceratons to catch up with.

Then Raph scratched the back of his neck a little nervously.

RAPHAEL: So.. (y/n), I wanna tell ya how I feel...

You stopped him from saying anything more by sweetly putting your index finger on his mouth as in motioning for him to stop talking.

YOU: Words don't need to confirm our feelings for each other. Let the action do it.

Then you made Raph lean closer to you, and kissed him on the mouth. One of Raph's legs got up and you heard 'aaaws' and 'oooh's from the others, even giggling. You and Raph couldn't pull away from each other, just letting that kiss speak for both of you that you guys love each other. After a while of making out, Raph slowly pulled away and looked you straight in the eyes, and you in his.

RAPHAEL: I love you, (y/n)! Will you be my girlfriend?

YOU: I love you too, Raphael! With pleasure, I'm your girl.

Then the two of you kissed each other again, and made a second space kiss with each other while the others are still watching.