The next morning, Marinette brought her gift to Adrien at school, and he was surprised. He pulled a red polka-dotted jacket out of a bag, which still had something similar inside. It was Ladybug pajamas, made out of the softest cloth.
This kitten was on catnip by the level of joy on his face. He didn't know what to say, since he was both happy to have such a gift, and sad to be unable to use it, since he sleeps with her as Chat. Though wait, she has Chat pajamas herself…
Marinette was a bit discouraged by his pause. He turned his head to her, and with sparkling eyes said "May I sleepover with you?", unable to hold his excitement. She blushed, loving the idea. Their friends choked, since a personal sleepover of a couple is a special thing. "Uh-huh!" She hugged him, and he hugged her back "Thank you, Marinette, you're the best!"
He was in high spirits, and after photoshoot came straight to her house. She was bathing, so he spent time with her parents. They were happy to see him, yet determined to have a serious talk.
They asked how serious he was about Marinette, and he blurted out how he is in love with her, how perfect she is in every way, and sworn to protect her and always be by her side.
Then came Marinette and invited him upstairs, and her parents told them to have fun, breaking into tears of pride a little as Adrien went up. They were so happy for their daughter.
The couple couldn't start anyhow but with a passionate kiss and embrace. They did their homework quickly and started playing games, including board and video. They had a lot of fun, and her parents gave them sweets in between. It was the perfect date, no need to be awkward at a park or cinema, doing nothing. They changed their clothing to pajamas, and he was overjoyed to see her. He just had to take photos for memory, and they both made various silly poses. She even 'pranked' him by unexpectedly kissing him as a photo got taken, but he one-upped her with a passionate embrace.
They had a lot of fun, especially in a team first person shooter and Twister. Adrien was surprised of her flexibility, thinking that only Ladybug can rival him. It was getting late, and they got tired, so they went to bed, but not to sleep yet. And not to fuck either.
Marinette turned on her bedside light so they could chat. They talked about various things, including guessing on miraculouses nature. They thought of bad luck - good luck pair, which reminded Marinette of a poem and she decided to turn it into a game. "There was once a man with the weirdest luck. One day, he won a flight to a beach resort. Unlucky, his plane crashed. Luckily, he fell out before it did. Unluckily, he was falling to his doom. Luckily, there was a hay stack on the ground. Unluckily, there was a pitchfork pointing out of it. Luckily, he missed the fork. Unluckily, he missed the hay stack." - "Hahaha" - "Let's continue the story, saying one sentence at a time. Which side do you wanna be?" - "Uh, you go first" Naturally, kitty chose bad luck, fit of Chat Noir - "Ok, Luckily, shockwave of plane explosion broke his fall" - "Unluckily, he still landed on his face" - "Hehe, luckily, there was a maid to take care of him" - "Unluckily, he still lost his vacation" - "Hmm, luckily, there was Ladybug to increase his good luck" - "Unluckily, she was with Chat Noir, who increased his bad luck" - "Whahahaha" Marinette was exhilarated, knowing that's exactly how it goes with him, and Adrien couldn't help but to laugh too.
They continued chatting and joking through their yawns, until it was very late and they were too sleepy to continue. It was long after Marinette turned her light off, and they sweetly fell asleep together.
They dreamt together of being in a kindergarten, where they had all kinds of toys and giant plushes to climb. They challenged each other, and played together. They needed no words, as they could speak through telepathy with each other. Sweet lullabies were heard in the background, and defeating akumatized babied was as easy as giving them candy or putting a blanket over them, making them fall asleep. That is, they weren't akumatized by a butterfly, they just got spoiled and mean. The pair still transformed into their heroic alter-egos without each other noticing, which was simply putting a band over their eyes. And their kwamies were mini-plushies with secret pockets for said bands.
One day, they had to face an ultimate enemy - the stairs. Ladybug used her smartness to take an elevator, charming her Chat Noir. Together, they had the happiest childhood, and as they woke up, the feeling of always being together stayed.