Behind-the-scenes cuts from 'School 2015' featuring Nam Joo Hyuk, Kim So Hyun, and Sungjae!

In the adorable photos released, the three main actors are seen posing, already showing undeniable chemistry among the three. With the warm sunlight on her, Kim So Hyun stands between the two handsome boys, smiling happily. 

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One photo gives viewers a peek at the unique personalities of each character as well as their relationships with each other. While Sungjae seems to be professing his unrequited love for Kim So Hyun, Nam Joo Hyuk cooly flashes a finger heart towards the actress. 

While working with these young actors, the director of 'School 2015' commented, "When the three actors met for the first time at the script reading, I could tell they were a group that exuded refreshing chemistry just by looking at them. I hope that their optimistic and bright energy translates to the viewers as well."

Meanwhile, 'School 2015' will air its first episode on April 27, following the last episode of 'Blood'.