(One female lead, one female lead, one female lead. The male lead only wants to cuddle up with Firefly.)
Shuohui falls asleep in class and, before he knows it, finds himself in a world where everyone awakens special abilities.
(A quick disclaimer: The story moves at a fairly slow pace, and there aren't many fights. There's more daily life between the protagonist and Firefly. The System doesn't make much of an appearance unless the protagonist opens it himself or an urgent mission comes up. Also, the author isn't superhuman and can't make everything perfect. Thanks for understanding!)