On May 15, Joo Won attended the press conference for his upcoming SBS drama 'My Sassy Girl,' where he mentioned his girlfriend BoA's message just before his military enlistment.

With just a day left until his enlistment day, the actor shared that BoA told him, "It may seem like a long time, but it's really not... return safely and in healthy condition."

Onto his thoughts in leaving for the army, Joo Won commented, "I'm leaving tomorrow, but I'm actually in a good mood at the moment." �He then added, how he was looking gloomy despite having an enjoyable time with his friends days before. �"My friends told me to 'brighten up a bit.'"

SEE ALSO: Joo Won confirms enlistment date

Meanwhile, Joo Won's new SBS drama 'My Sassy Girl' is a remake of the original film but takes place in a historical time period. It will have a total of 32 episodes and is set to begin airing on May 29.