Scara failed his next test, which is why the teacher, promising you a good grade, asked you to study with him.  But you couldn't stand each other because you were enemies.

But still you sat at his house trying to explain the tasks.  But he didn't solve any of them correctly.  Each time you became more and more disappointed.

"I can't do this!  I need motivation!"

He said crossing his arms over his chest.  A second later, a grin appeared on his face.

"What about the bet?  For every correct task you will kiss me."