'Cheese In The Trap' is about a university student played by Kim Go Eun and her sunbae played by Park Hae Jin. Kim Go Eun's character works while studying because she's not financially well off, and Park Hae Jin's character is described to be good looking, smart, athletic and kind, but with a dark side. Seo Kang Jun's Baek In Ho is the sub-lead who fights for Kim Go Eun's affections and has a rivalry with Park Hae Jin's character.

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He confessed that before, he had a hard time because he'd played characters that weren't around his age, but he had a lot of fun with this character because they were very similar in age. He revealed that he felt like he was coming to play with Kim Go Eun's character more than that he was coming to act.

Check out the clip above!