Sleep
She was getting worried, and that was very unlike her, but it most likely had something to do with the sleepy blue haired boy that had apparently been having a hard time concentrating in class.
They had been going to Tartarus so often, and it must be wearing on him. So, Mitsuru decided to intervene and suggest that they take a break.
But at the end of the day, Mitsuru couldn't find Minato. He wasn't in the school, so where could he have gone?
Mitsuru started looking around in the places that she knew (from what she heard from his friends). He should go straight to the dorm and go to bed early, and staying up wouldn't help.
She found him in the park, sitting on a bench. His grey eyes were fixed on the sky, and he looked like he was going to fall asleep at any moment. Mitsuru approached, hoping to...
He was so tired, but he kept pushing on. There was something in that tower...something, but what? Whatever it was, it felt like it was 'calling' Minato...calling...
He couldn't think that well. And sleep was becoming more and more appealing....his eyes started to close...
Footsteps brought him back to the living world, and he cracked one eye open to see Mitsuru coming towards him. "...hello Mitsuru-Sempai." Minato's voice came out even slower and quieter than normal from lack of sleep. She nodded and joined him on the bench.
"Arisato, I've noticed that you been having trouble concentrating in class. I suggest that you sleep in tomorrow." She said. Minato thought about it. Mitsuru was right, he was tired...very tired....but..."We're making process in Tartarus and..."
He leaned to the side, lightly against Mitsuru. She was soft, like a bed...Minato shut his eyes and promptly fell asleep.
Mitsuru stiffened when she felt the full weight of the blue haired boy lean against her. She could hear the soft breathing of the sleeping form, and decided that it wouldn't be fair to move. So they stayed there until the sun went down.
More cheese. A well.