Yuki Nijino's manga / #Hair Salon(1)

Ch. 3 Skimmed the end of ch3 - Kazuya, the manager of a hair salon, is a gay man who enjoys impersonal flings with no strings attached. One day, his childhood friend pressures him into taking on an assistant beautician -- although he rejects the troublesome idea of having men in the workplace, he relents when he hears that the assistant in question is "Miki-chan"... but he turns out to be a man with drop-dead gorgeous looks --?!