From Transient Mirage:
The love-love romantic comedy-- "Osuteki Darling" -- of Kaibara Serika and her two-year-younger boyfriend, Aoki Taiki, makes a powered-up appearance. After dating for two years, Serika has become a college student and Taiki is studying for exams. Even though their circumstances have changed, their love-love hasn't changed. At least, it shouldn't have, but now Serika is being dragged into conversations about having an arranged marriage!?