Lol, I know it's kinda already late but, I'm going to write it anyway.

You peeked into the lair, biting your lips nervously. You could see Leo sitting on the couch, watching
Space Heros so intently that he didn't notice you quietly walking into the lair.

You took a deep breathe quietly and fixed your looks one more time before quuetly walking up towards your beloved boyfriend.
You crept up behind him and smiled, putting your hand on his eyes. You gave Leo a quick kiss on his cheek as you whispered.
"Happy National Boyfriend Day, Leo."

Leo smiled up at you inmediatley as soon as you removed your hands from his eyes and grabbed your neck as he pulled you down into a passionate kiss which startled you for a few seconds.

"Thanks, sweetstuff,"Leo said as soon as you two broke the kiss.
Leo's eyes widened when he relized how beautiful you look today as you cupped a few strands of your hair away behind your ear.

The way you smile. The way your hair falls from behind your back. The way you (e/c) eyes filled with love when you look at him. The way you look beautiful in that simple blue dress.

"Wow," he said and you looked at him.
"What's wrong?" you asked and he smiled at you, "Oh, (Y/n). If you're looking this beautiful even in something so simple, I'm going to have to try a lot harder to keep you all to myself."

You gasped as in a swift moment, you found yourself in Leo's laps from behind the sofa. Your heart started beating so fast as he held you tight, giving your forehead a light kiss.
And even with that simple gesture, you found yourself blushing a mess.

He kissed your hand and looked into your eyes with a fond smile on his face making you think how deeply you've fallen in love with this turtle.
"Oh, Leo. I am only yours and I'll always will be," you said and he smiled as he let you rest your head on his shoulder and play with your hair.
"I know."

You sighed, a guilty feeling coming up in your chest when you remembered that you didn't get him a gift although he always get you one.
"I was supposed to give you a gift but, my plan got backfired," you said.
"I don't want a gift," Leo said and you looked up at him, confused.

"Huh? Why?"

He smiled at you as he took a few strands of your hair in his hand and kissed it. "I've already got the best gift in the whole world. You," he said, looking into your eyes and you blushed, "Still..."

Leo chuckled and pulled you closer as he continued to play with your hair.
"Let me tell you a story," he said and you rose a brow slightly.
"A story?" you asked, looking into his eyes and he nodded.

"Yep. You know...I never told you that I've met an angel before. In person," Leo said and just then, Mikey popped up of nowhere with a wide grin on his face.

"Aww...Thank you," he said and giggled as he disappeared into the kitchen while Leo rolled his eyes and you chuckled.

"And what happen next?" you asked, leaning back onto his shoulder.

"Well...she fell from heaven and I caught her from getting hurt. And now, she's in my arms, looking so beautiful," Leo said and your eyes widened when you realized he was talking about you.
You blushed and buried your face in his shoulder to hide your red face.
"You..." you said, trying to hide the wide smile appearing on your face and Leo laughed.

"What? It's true. Now, she's hiding her cute and beautiful face from me," he said and you groaned, still smiling.

"Stop being so sly."
"Then, stop being so adorable."
"Oh, stop being so handsome."
"Then, try and stop being so gorgeous."

"Gosh!" you yelled and laughed, biting your lips as you just snuggled more into his chest, trying to hide your red face.

Leo laughed and kissed your forehead once again, cupping your hair.
"I win," he said with a playful smirk, making you pout playfully, "Shut up."

"Get a room, you two," Raph said, passing by as he headed towards the kitchen.

The two of you blushed before chuckling as you cuddled and continued to watch Space Heros together.