I.D. by Kanbe Akira
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Manga: Freezing Flame
Mangaka: Kanbe Akira
Genre: Yaoi
From FS:
The unsuspected newbie of the Police Investigation Division One, Detective Hinari was dispatched to deliver a sample to the forensic lab. There he encountered researcher, Yasoshima Shiro, who reminded Hinari of his first love, a gentle police captain. Immediately smitten at first sight, Yasoshima lured Hinari with a DNA lecture and preyed on the still innocent Hinari! As much as Hinari hated to admit it, he wasn’t entirely unaffected by Yasoshima. Will Hinari be able to resist the quirky scientist!? A delicate yet comical love story!