Crash Landing On You stars Son Ye-jin and Hyun Bin have been dating for almost a year after filming the 2019 hit K-drama, but fans have been starved of sightings of them together.

News of them dating broke at the end of last year, but they have been relatively private and low-key in public as well as on social media.

In a savvy marketing move, telecoms company Smart Communications in the Philippines has reunited the two good-lookers for their first commercial since they went public with their relationship, perfectly timed for release on Valentine's Day on Sunday.

In the sleek one-minute advertisement, Hyun, 38, searches in a futuristic setting for Son, 39, who appears to be in another city or a different dimension.

Finally, presumably with the power of Smart's 5G offering, the star-crossed lovers come face to face.

The advertisement ends with Hyun asking in English: "Do you believe this is possible?"

And millions of #BinJin worshippers collectively swoon when Son replies: "I do."

The couple also filmed a short and sweet Valentine's Day video for the telco, beginning their message with a Filipino greeting, "Mabuhay", and ending with "Mahal namin kayo", which means "we love you".