The Diligent Thunder and The Menacing Yellow Flash

A wealthy high school girl named Keqing was enrolling in Teyvat High School. There are rumors about two group in the school whom are feared by every student. one of them called the Fatui.
But the most feared group was named The Abyss. Their leader, is unknown. But it is said that the leader is fearless, extremely powerful and durable. But, the leader is missing something in their life.
How will the two cross paths? What Relationship will they make? How will their future look like?

Note: I do not own the story cover, Source: https://images.app.goo.gl/9oerprb49UNJB4Z1A (Yes, Reddit's banned on my country.)