Helen is your introverted classmate. He doesn't talk to many people and often you can even notice how he was bullied. Maybe that's why he's so closed? You never messed with him. The boy studied well in principle, but he was never given algebra.* Once again, Helen did not write a test well, so his teacher forced him to study with you. That's why you're sitting in front of the guy right now while he's trying hard to solve the problem that you gave him. In the end, Helen said quietly, "I can't decide this."–