R.o.S. Mina's test

Mina gulped as she walked onto campus. She was nervous. She had spent the last hour going over geometry with Shin.
"Good luck Aino-chan!" Shin waved to her from the gate.
Mina smiled as she waved back. She wished he would call her Mina, but he was refusing too so far. Once she was inside, she saw him begin to walk away.
"Who is that?" An underclassman asked as she oogled Shin from the window.
Mina smiled, "A friend." And with that she marched to class. She had to pass this test.
Mina was amazed to see that she finally understood what was on the paper in front of her. Shin had really helped her prepare for this test. But then again, he made sure to bribe her and keep her attention with said bribe. She turned in the test and then axiously sat at her desk waiting for the teacher to grade it.
The teacher gave her a surprised look to see her waiting for the result. She still began grading it anyway. Her eyes went up by the end of it, but then smiled happily as she got up and walked to Mina's desk.
Mina looked up at her teacher. The nervousness was eating away at her.
"Well done," the teacher placed the paper on her desk. "You passed.  And did a lot better this time. You studied really hard for this with your friends."
Mina nodded. "Saitou-kun is a great tutor." She looked at the 78 written on the paper. It wasn't an A, but it wasn't an F, so Mina didn't care. She picked up the paper and went to her next class.
She met Ami in the hallway.
"How was the make up test?" Ami asked.
Mina smiled, "78."
"That's great," she congratulated. "Do you want to celebrate after school at the arcade?"
"That sounds good, but Shin owes me something first. So I want to show this to him."
"What is it that he owes you?" Ami asked.
Mina quickly told Ami about the concert plan. The blue haired girl smiled at the idea. "Do you want to help?"
"I'll see what I can do." Ami nodded.