Akutagawa is the type who doesn’t know how to baby talk or find the point to, considering his childhood. So I think this is on point I really do this he treats his babies like mini adults. Probably lulls them to sleep reading his paperwork outloud because someone mentioned he has a very soothing, low voice that the kids find comfort in.
Talking in his romance era vampire speak of how, “I shall rip this foe asunder if you want, my little bug, would you like that?” While his kids babble incoherently. Somehow they know exactly what the other is saying.

Akutagawa, holding his baby in his arms, in front of an enemy who he planned to kill but cannot fully decide: what do you think, sweet bat, should we kill him or spare his life?

Baby, bug eyed: buh (Kill him)

Akutagawa, glowing with pride: wonderful choice

Atsushi, in the background: this is why I don’t let you take them to work

Akutagawa goes back and forth between being confident in his coworker’s ability to keep his child safe but he has so much trauma and issues to work through that are only exacerbated by pregnancy hormones. I think he’d be constantly saying something like, “we should get going soon, otherwise we’ll be home late” or “i told Kunikida-San [something very niche about their kid that he’s already told them 20 times out of anxiety], right?”. I like to think atsushi does his best to comfort Akutagawa, entwining their fingers together and reminding him that “you’re the one who said that they’re competent and trustworthy, so why not let them prove it?” But I also do think he is equally very fucking anxious about leaving their baby unattended. He enjoys nothing more than having his partner and their cub all curled up in their little nest together

Atsushi is addicted to aku being on his face, period. He doesn’t care if Akutagawa is being a needy brat or a sadist, he loves feeling the warm, firm weight of Akutagawa on top of him, soft, plush thighs wrapped around his neck while he buries himself deep between Akutagawa’s legs. He moans louder the more aggressively aku rides his face, hips thrusting to seek more and more pleasure that atsushi knows only he can provide his lover. Nothing feels better than peaking up through tear blurred eyes and seeing Aku’s precious, flushed face get redder as his eyes start to roll back, his hips twitching more and more and until he’s cumming all over Atsushi’s face, the tongue lapping at his sex forcing every bit of cum out of him for his own content

Sorry for the long time to respond and also sorry but this made me burst out laughing. Hate fucking in the chem lab because they keep fighting and can’t get the titration correct and they’re on their 7th attempt. They keep eye fucking each other when they think the other hasn’t noticed and it’s a dangerous line between sexual tension to needing to go to the nurse when they get too careless and let a chemical touch skin. Thinking of them making out in the empty classroom, pressing each other up against the tables and growing red in shame when they knock over a flask stand and break it ://

High school sskk is very silly even during hate sex and sexy times

There’s something about the tiger that has Akutagawa feeling on edge even when he’s clothed, something purely animalistic that doesn’t listen to reason scratching under the surface of that human conscious. It especially becomes something he’s aware of when he’s pressed against the pillows, half undressed, with little fabric to protect him against a man eater. He can’t do much but whimper and squirm when he feels Atsushi’s warm breath against the fabric of his panties, and he can’t hold back the sqeaks when that rough tongue peaks out to tease him through the panties.

Atsushi is mean even when he doesn’t mean to be, or even know that he’s doing it. He’s so keyed up at the sight of Akutagawa that hard for him to be slow and careful with him….but when he does get the chance to do it, it never disappoints. One leg over his shoulder, the other one trapped under his body as he has a taste of his lover’s slick through the soaked panties. He enjoys this, the feeling of Akutagawa trying desperately to grind his hips back against Atsushi’s face while Atsushi holds him down to tease his pretty hole through his panties. The detective is so /whiny/, pleading Atsushi to get it over with just to have his petulant demands cut short with a sloppy kiss against his clothes cunt. It only makes him hornier