Stop Pretending, You're My Online Girlfriend

Chen Mo has an online friend he's been chatting with for two years, whose username is 'Little Fish Jerky'. They play games together, stay up late chatting, tease each other, act tough, and share their lives. He knows she doesn't eat cilantro, knows she gets stubborn when she fails math, and knows that when she's truly angry, she doesn't curse. The only thing he doesn't know is who she actually is. Until the start of college. Chen Mo meets his classmate Su Wan. She's beautiful, quiet, and polite to everyone. She has nothing in common with the 'Little Fish Jerky' who calls him 'dog thing' and threatens to kill him. But gradually, Chen Mo notices something off. Same habits. Same gaming experience. Same way of speaking. Even after he annoys Su Wan in real life, a message from 'Little Fish Jerky' arrives the next second. Chen Mo finally confirms: his online girlfriend of two years is sitting in his own class. — Description from novelcodex.org