Gokudou Kyun Koi: Renai Drama Daisuki ni Yakuza no Renai Jijou

A complex, hard-boiled tale of a romance-drama scriptwriter and a stoic gangster. Ushio Oyamada, a scriptwriter in her 30's who is in a bit of a romantic comedy slump, falls in love with someone she's destined to be with while doing research for a drama that could be her comeback...!?

(Source: Kadokawa, translated)