Rare Omega Shunki

Matori, a tiger from the Amur clan, aiming to be the "strongest omega," one day suddenly reunites with the Japanese wolf, Koko, whom he used to pine after when they were younger. Matori is charmed by his unchanging kindness and grown-up appearance, and they laid their bodies together. In the midst of this, Matori, who had a dream that he would mate with the person he loves, sees signs of Koko's alpha awakening, and worries that he may have only held him impulsively due to his heat...

(Source: Frontier Works, translated)