Isekai Quartet 2

Synopsis

Class 2 will have an SAT-style test, so everybody has study sessions. During the test, Ainz is nervous because he was a slacker in school, so he tries to cheat by freezing time so he can copy answers. He is shocked when Aqua, Tanya, and Subaru are still able to move in frozen time. The three wander the room wondering what is going on because Ainz pretends to also be frozen. When the time freeze ends, everybody is able to quickly return to their seats except for Aqua, whom Roswaal accuses of cheating and fails. Ainz, after solving only the simple questions, discovers that the right answer bubbles form the image of Pandora's Actor's (who made the test) head. He completes the head and gets 100%.

(Source: Wikipedia)