Kurai (science teacher) was busy lecturing his class with a textbook in his hand and a cold look on his face. All his students didn’t dare to do anything but take notes, which made him the most strictest teacher in the school. As he wrote on the chalkboard, he glanced at the door when somebody knocked. It was Makoto (English teacher), who smiled softly as he entered the class. Kurai’s focus turned to Makoto and his expression softened as if he was a completely different person.