Heian Era, 812.

Muzan, being 16 was considered old enough for marriage. Despite denying it, wanting to rather have a lonely life, it was already all arranged. And you, being 14, were arranged to marry him now. He was known for spending his time alone, being cold and mean. Where you, you were probably the sweetest young girl, always having a smile on your face, thankful for everything. When he first had to meet you, his fiancé and soon to be wife, he looked at you with a cold gaze, and you looked up at him with a bright smile on your face, following him around. You wanted to know him good. While he was confused and annoyed, trying to get away, you were following him, asking if you could call him "Muzzie" because it sounded cute, of he liked cuddles...Damnit, he couldn't deny it, you were adorable and sweet. Yet, also..childish. He was more mature than some adults, already being at meetings for clans with adults, while you were outside, playing with butterflies and picking flowers.

Two complete opposites, like the moon and his sun.

Yet the more time he spent with you, the more he craved attention from his sun. His sunshine in that boring life.

As you two got married, he was looking at you, how happy you looked despite knowing you were getting married of to a guy who was a child himself, as a child yourself. You looked too happy. He didn't like that. Probably because it made him flustered, despite him hiding it well under that cold expression. Your sweet smile made his heart melt. Your soft voice was also cute. Even in your own wedding, while everyone was eating normally, you only ate sweets and mochi. He knew you loved sweets. And maybe that's why you were as sweet as them..? His pretty, cute little wife. He was lucky..but definitely wouldn't show it. What an..unusual marriage. But he enjoyed it was too much.

Since Muzan started to live with you, his life slowly changed. He knew he deserved the best. He was handsome, usually calm, smart, and was rich, could cook perfectly, was just..perfect. Yet with all that, you were just the perfect one for him, or so he thought. Now, next to his usually black, boring kimonos were your prettier ones. Next to him eating fancy food was now you, who ate sweets while smiling. Next to him in the big futon wasn't only emptiness, instead, you who always cuddled his arm while sleeping now. He was getting frustrated. You were so..so cute, it was making it hard for him to ignore your cuteness. Damnit, that made him extremely angry. He couldn't handle someone's looks for the very first time. And worst of all? That person was..his wife.

Someone he had to see that cuteness, that prettiness of, forever.

His wife, his partner for life.

✧

It was early in the morning, and as usual, Muzan woke up earlier. Despite being a young teen himself, he always woke up early, like an adult. But you weren't exactly a morning person, so you were still asleep, your small arms wrapped around his bigger one, the small whimpers you made while sleeping. As he looked down at you, his gaze was annoyed. He was annoyed of how he couldn't ignore these feelings he had for you, that he couldn't hide his feelings for the first time. How his heart couldn't help but melt in your cuteness as you slept clinging on his arm, looking like a small kitten. So he spoke up, his voice as calm as usual.

Amanai. Wake up.

Muzan mumbled and poked your cheek, making your eyes flutter open, looking up at him with a sleepy gaze. His gaze was on yours, and his fingers on your cheeks. They were so soft, and despite the fact that you had a slim body, your cheeks were chubby and cute. So soft and squishy. They even still had baby fat, which made them even softer than they already were. Like a child's. Which was technically, since both of you were teens. Muzan pinched them as if he was playing with your cheeks as you two were on the futon, under the blanket. He sighed, looking slightly irritated, a pout on his lips.

Your cheeks make me angry.

Damnit, he was having a cuteness aggression because of you. Again.