Hikensha α no Kyousei Hatsujou Kiroku

On his first day at his grandfather's pharmaceutical company, Leo Shindo (alpha) meets an omega for the first time ever. The only omega in the company, Amasawa is developing a heat suppressant that would work both on alphas and omegas. Leo passes out from Amasawa's good looks after exchanging a few words with him when they first meet. Leo finds himself smitten with the attractive Amasawa, but is shocked when Amasawa, who usually draws a line between his work and personal life, asks Leo to help test his new suppressant in their private time.

(Source: Renta!)