Yes — Korea treats narcotics offences very strictly, and being a foreign student is not a mitigating factor. Penalties can include prosecution and deportation, which ends your studies.
The Ministry of Food and Drug Safety publishes guidance on drug misuse for the public; the card is in the Learning Centre under the safety track. Please read it before you arrive rather than after something happens.
Also be careful with parcels or medication you are asked to carry for someone else. That request is a known trafficking pattern, not a favour.