Isshiki-san wa Koi wo Shiritai.

Sinopsis

A maiden who doesn't know what love is tries her hand at dating as a pseudo-couple! Inspector Rinna, who is respected by everyone as a hard-working and serious policewoman, seems to be having trouble with her work lately. The reason for this is because she loses focus. It only happens when Meishi, the detective she works with, is around... So, she makes a choice...? (Source: Kadokawa, translated)