You and Taehyung are classmates but boyfriend and girlfriend.

In the class, you and he didn't sit together so he couldn't talk to you but could only silently look at you. TaeHyung and his friend talked and discussed skipping class. While Taehyung was talking to his friend, the teacher suddenly asked you to go to the library to get some books for the teacher. Hearing that, Taehyung immediately stood up and spoke. “Teacher, let me go with her to help her, the books is heavy”