Unmei no Aite wa Joushi datta

Sachi, nearing 30, quits her abusive job and is cheated on by her boyfriend. Having lost everything, she decides to use her remaining paid leave on a solo trip to a tropical paradise. There, a man named Miyano helps Sachi, who struggles with English. The two have a one-night stand during their trip. After returning to Japan, she unexpectedly encounters Miyano again at her new job…

(Source: Mugen Factory, translated)