Learner emotions represent sudden, dynamic, and complex adaptations to the language classroom environment. Recent Second Language Acquisition research calls for a more holistic perspective in approaching classroom emotions, one that considers emotional variations between and across learners, and which foregrounds the interconnections among emotions and between emotions and the learning environment. This paper approaches emotions from a complex dynamic systems perspective and investigates the classroom emotions of five university students of Korean as a foreign language using a Q methodology intensive single-case study design. Overall results show that students have sometimes similar, sometimes different emotional reactions depending on classroom events, indicating different levels of interaction between a learner's emotional system and other individual characteristics. Additionally, a more fine-grained analysis at the level of individual learners reveals clusters of emotions triggered by the same event and foregrounds the relevance of epistemic emotions for instructed foreign language learning. The results are discussed focusing on new hypotheses to inform future SLA emotion research and classroom practices.