Isshiki-san wa Koi wo shiritai is a Manga/Manhwa/Manhua in english language, SUGGESTIVE series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

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 policeman, 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…?