A teaser for upcoming KBS series, 'School 2015,' was recently released on the official KBS drama YouTube channel.

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The short teaser video included a montage of every 'School' series, which first aired back in 1999. 'School 2013' was the most recent iteration of the series and featured now top actors such as Kim Woo Bin and Lee Jong Suk.�

The producers of 'School 2015' hope to brew up yet another 'School' syndrome with cast members such as BTOB's Sungjae, Nam Joo Hyuk, and Kim So Hyun!�

The first episode is scheduled to air on April 27. Check out the teaser below.