I Try Chemistry 01

"Sunbae, I have to go. The student council needs me." Sohee had said, "Today Sunbae is to go to chemistry and," Sohee bites her own tongue. She sighs and shakes her head as she looks at me with the hint of guilt, "What's wrong with me... Why am I treating Sunbae like an incompetent? Sunbae literally is the best man for the job." She clears her throat and her sad lips shift to a smile. "I'm really sorry. Anyway, Sunbae already knows what to teach."

I do?

"it's Sunbae's lesson anyway."