NSFW ideas:
Rio getting into a super deep sub space and being super subby and sucking a dildo for like a really long time
ABO Agatha is an Alpha and has trouble controlling herself around her girlfriend, Rio, and omega, but tries to not act on her hormones because their relationship is still new and she doesn’t want to push
Rios first time getting a hickey
Someone making a joke about Agatha being a bottom and her getting insecure and Rio shows her how amazing it is to be a bottom and gives her multiple orgasms and makes her squirt for the first time
Rio has an oral fixation and loves to suck Agatha’s nipples and eat her out
Their relationship is secret and one day their friends spot a hickey on one of them and is teasing and asking who it is and the other person gets mad and growls “that’s MY mark”
Fluff
Agatha being super duper touch starved and lots of cuddles
Maybe Agatha keeps staying up late working and is super tired and falls asleep on Rio in front of their friends (they are not dating yet) and Rio carries her to their shared apartment and cuddles her to sleep and makes her all better
Rio and agatha showering and lots of non sexual intimacy. Rio washes Agatha’s hair and she starts crying because she feels loved
Rio on her period and extra cuddly and Agatha holds her on her lap while she’s working
Someone hitting on Rio and gets mad when she says no and Agatha steps in and is like “touch her and you die” and Rio thinks it’s the hottest thing ever but Agatha is so jealous and upset
“Can I kiss you?” Other person nods vigorously
Hurt/comfort
Rio wanting to leave the mortal world permanantelt because she thinks Agatha hates her and Agatha cries a lot
Rio dealing with the guilt of taking Nicky and absolutely hating herself and being super insecure and Agatha doesn’t know how to fix it
Rio being a player before they started dating and one day Agatha being insecure and wondering if Rio is loyal to her
Rio has hanahaki but since she’s death and can’t die, she has it for eternity
Agatha contemplating suicide because she thinks she’s a terrible person