The merman and the siren

chapter 16

A/n: i'm back 👹👹 i couldn't really update because of school 🥲 anyways—

Muzan pov:

Me and (M/n) are still in the tank, (M/n) has been asleep for God knows how long, but i can't really blame him tho. I ran my hands through his soft (h/c) hair. I heard (M/n) purr in his sleep which is absolutly adorable. I kiss his cheek as i hear him groan softly. "Good morning, sleepyhead~" I purr in his ear.

"Mmm...What time is it...?" He asks in a tired voice. "It's 10am." He sighs softly. "It's too early for this, Muzan..." He says in a whiny voice and i chuckle. "Whatever you say, my little siren." I kiss his forehead, he lays his head on my shoulder.

"How are you, my dear? Did i go too hard?" I ask while rubbing his back. "I'm fine, just tired..." He murmurs. "Alright, dear." I look and see that our tails are still wrapped around each other. "Muzan?" "Yes?" I look at (M/n), our noses rubbing against each other. "When will we get our food?" "In 2 hours."

As i say that (M/n) huffs and i chuckle. "Are you hungry?" He nods. "Aww~ Poor baby~" I tease and he pouts. God he's so cute when he pouts. "You're such a tease!" I chuckle. "Sorry love." I say with a smirk and (M/n) huffs. "I want to eat!" I sigh softly. "Love, you know we have to wait." "But i'm hungry!!!" Well, this is gonna be a long day.

(Time skip.)

After 2 long hours of (M/n) complaining that he wants to eat our food is brought by Tanjiro, and if i'm being honest i never liked him.

Tanjiro pov:

I just gave Muzan and (M/n) his food but Muzan glared at me. It scared me so i backed away. I heard (M/n) chewing the Tiger Barb. Why did it sound like he was chewing on human flesh?

Muzan pov:

I held (M/n) close to me while he eats, i nuzzle my head in the crook of (M/n)'s neck. Turns out sirens are very very hungry after intercourse... "Hey, love?" I ask and (M/n) hums. "How much food does a siren need when they're having children?" "About...156 067 980 fish per day, why?"

I was speechless, i knew that sirens need quite alot of fish if they're expecting but that much fish? "Wow..." (M/n) giggles. "You're surprised, aren't you?" I nod. "I knew that sirens eat more when they're having kids but...so much?" "Yes, i know it's surprising but it is what it is." He chuckles and kisses my cheek. "Mhm, i can't wait for the kids." I say with a smile and rub his belly.

"Me too..." He says with a smile as he wraps his arms around my neck. I chuckle. "Why are you chuckling, Muzan?" "It's just very cute how our tails have been wrapped around each other the whole time." He looks at our tails and blushes. "Mhm, i like it." I smirk. "Well then, let us stay like this for a bit longer." I say and he hums.

Fun fact about my au: A baby mermaid/merman is a 'guppy' and siren's name is 'pup'. Idea by: _Why_you_gay_