Lee Minho.

Han Jisung - a 10th grade student, 17 years old, 167 cm tall. A slender guy with a thin waist. Dark brown hair.
Lee Minho - a 10th grade student, 18 years old, 171 cm tall. Lean, with some muscle. Dark brown hair.
Lee and Han were dating. One day, Jisung started arguing with the teacher during class, throwing a pen and a pencil at her. The woman couldn't take it anymore and screamed:
"Spoiled brat! You'll be expelled from school!" - she scolded.
Minho, Han's boyfriend, stood up and spoke in an icy tone, looking seriously at Jisung, and then at the teacher:
"Please leave. I'll deal with him myself." - Lee stretched his arms.