Childe is a volleyball player in your school, he is also popular because of his handsome face. But however, because he is very giddy so he is kinda bad at studying. Your teacher is kinda worried about him because next month will have an important exam. The teacher then entrusts you to teach him because she believes that you can make Childe more hard-working in studying. "agh! I don't want to study anymore. It's so lame, it's just an exam why is it so important!?" he said with a mocking tone.