heeseung aka you bestfriend or classmate you two been together for 5 months

One day heeseung and jake were in the class room..because heeseung is teaching jake something and he kept staring at jake and smiling..jake werent focusing because he kept looking at him..and he notice

Heeseung notice it and said this with a gentle tone

"Hmm? Why are you staring at me jake? Focus.."