4 years apart

The first day.

Kang Misa ate her breakfast. She snatched her bag and rode her bus to university. Misa hears a cute giggle behind her. Looking up behind her, a joyful looking boy smiled hat her cheerfully. Her heart fluttered. "Hey, my names Yi Jino ! Wanna be friends?" asked Jino. Misa smirked and nodded.
After the bus stopped they both walked together to the entrance. They shown each other their time tables and noticed every class they had, they were in the same one.
Walking towards the entrance of English class, Misa tripped over an eraser. From behind Jino catches her staring into her eyes. Misa's eyes suddenly widened. They made eye contact. Mina quickly stood up and acted like nothing happened.
Jino's heart pounded asking if she was okay.. Misa stuttered,"Y-yes.. thanks though.."
After arriving in class, Mina realised she didn't have a pencil. She stayed quiet. At the end, the teacher (Sir Han) chose Mina to show her work as an example. Her hand trembled. Looking up, she said," I-I didn't have a p-pencil." Mr Han yelled to her, "DETENTION AFTER SCHOOL". Jino stared at her with pity. Out of nowhere, he cut Misa off and said that he was the one who didn't do it and that the work I have is Misa's. Misa looked at him in awe. Mr Han didn't yell at Jino -since he was the son of the school headteacher. Mr Han said that it's alright. Jino gleefully smirked at Misa as she was surprised. After class, they both walked out awkwardly.
"Hey are you okay?" Asked Jino
"Ehm yes.. but why'd you do that?"
"Because you're my friend!"
"F-friend..?" Replied Misa.
Jino nodded. His phone suddenly rings. His face drops, he starts running away leaving Misa confused and alone.
What will happen next?