Love and work aren't always easy! My turning point at 30 - Nao had worked solely in accounting since joining the company. She was enjoying fulfilling days in both love and work, but at the age of 30, she was transferred to the sales department. Nao tried to get through the tough work, finding solace in her favorite coffee, but her boyfriend was betraying her!!
(Source: Futabasha, translated)
— Description from AniList community (anilist.co).