Foreword. 

Would you like Latte? 

Im Sejun is a senior in high school. He has anxiety disorder, due to the loss of his father when he was eight. His stepfather is abusive to his mom, but didnt dare to touch him. Therefore he had troubles sleeping at night. He turns to ASMR videos to calm his anxiety.

Son Juyeon is an ASMRtist who goes by the name Yeonnie. She often reads bedtime stories on social media and post it for her own entertainment. But behind those activities, Juyeon is socially awkward who tends to be alone at all times.

Juyeon transferred to Sejun's school, and joined Sejun class. Things get exciting as Juyeon happens to be his fave ASMRtist.