Kimi to Tsugai ni Naru Shohou

"I want to be strong since I'm an Omega." Azumi, an apprentice bartender, has been training his body with this thought in mind. The huge change in his physique and body are the result of his all his hard work, but ironically, they throw his hormone balance out of whack. Now even when he takes a suppressant, his body can suddenly go into heat. In the midst of one of these attacks, he meets a suspicious man named Kuze, who offers him a Chinese herbal medicine and gives him a business card for a traditional Chinese medicine shop...

(Source: Fusion Product, translated)