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During an interview with @star1, Lee Jong Suk shared, "I am currently filming 'Young Blood' ('Blood Boiling Youth') with Park Bo Young. Park Bo Young is like me in that she is very shy and hard to approach..."

"I am in the middle of trying to get close with Park Bo Young but we use formal speech to each other. I call her, 'Bo Young sshi', and she calls me, 'oppa'... I will try to be able to use informal speech with her before our filming is over. We have good teamwork."

Let's hope Lee Jong Suk and Park Bo Young get close before filming ends! Meanwhile, Lee Jong Suk is also busy with his other film, 'No Breathing', which will premiere on October 30!