it says it in the title Soukoku Oneshot's Smut Fluff Angsty

Kyoko Kirigiri is a world renowned detective. She's solved every case she's ever been assigned except one. Her parent's murder. When she finds clues connecting her parents murder and Celestia Ludenberg, a famous underground gambler and drug dealer, as well as a former assassin in the world's largest assassination organization in the world, D.I.C.E., Kyoko starts suspecting her. She (reluctantly) teams up with Shuichi Saihara, a detective who's been chasing Kokichi Oma, leader of D.I.C.E., for years, and the detective's find themselves involved in the biggest chase of their careers. --- TLDR; Kyoko is chasing Celestia and Kokichi with the help of Shuichi because she suspects Celestia of her parents murder. I suck at descriptions. Criminal AU? Or would this be an Assassin AU? Idk.

Mini historias de nuestros prostagonistas (soukoku)

world announced that there was only 2 types of gender, and it's Alpha the highest type, most of them is a male while the female is only 10% of the alpha's population, while the Beta is composed of both women and man, liked just a normal human, they aren't that special they didn't go on some rut that the alpha's has. but without them knowing it's actually 3 types.. the alpha, beta and lastly the forgotten type.., the omega.., omega is rare to be found at the present year of 104th, scientist believe that they already left the world, so for the past years they announced that there was only 2 types. and what if.. that omega was come back, what life will that omega have?, who's the lucky person who'll be that omega mate, is it you?.., him?.., or them?.., and what if that omega was a rare type?.. read if you want to find out(~￣³￣)~. I declared that the characters didn't belong to me they belong to hajime isayama the creator of attack on Titan.., and the picture that I've use is not mine so credits to the real owner... and if you don't liked boys love then please don't bother to read.. I'm not that also good on English so please take good care of me.. ~yuan~

This is an AU but I thought it would be cute and stuff so that's what I'm doing :). AU description at the beginning of the first chapter.