You can say that you are at the brink of failing your studies. However, Childe made an offer for you to be his "fake" girlfriend for six months. He had also swore to himself that he'll help you out with your studies and it didn't took a lot of time for you to agree.

This day, Childe was helping you with your studies while you sat on his lap when you suddenly felt a huge thing that's poking underneath you.

"Stop moving." He whispered as he seems bothered but flustered by you on his lap.