You Overthink Things
You Overthink Things is my first Haikyuu FanFiction!
Rated Mature, Kuroo x Tsukishima as the main pairing. Also appearances of Bokuto x Akaashi, Iwaizumi x Oikawa and Daichi x Suga.
Tsukishima Kei always assumed he would be a beta. The majority of his family were betas, add his height and his naturally smart-arse attitude and there was no omegan quality in him. Yet he was an omega. Just because biology decided he would be weaker than others did not mean that he accepted the fact. Patches and suppressants with his personality and appearance would make everyone assume he was a beta. It wasn't until he met a certain alpha that Tsukishima started to realise ignoring his secondary gender was much harder than he anticipated.
See link for full story!