Awakening of the Calamity Demi God

A student sitting at the back of the corner of an empty class wearing a pair of earphone . The student seems like sleeping peacefully with his head lying on the table .

Suddenly a blue circle with weird symbols emerged from his feet , scream could be heard from diffrent places in the school .

The blue circle seems like swallowing the student body before completely dissapearing .

This is the story about a average looking highschool boy named Farel got isekaid and becoming a powerfull divine being.
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My first novel by the way ,and i accept critique
enjoy! :3