Can you recommend a novel where the female lead likes the male lead 1, and the male lead 2 likes the female lead?

The female lead's deskmate only had her grandmother seriously ill and died. She fell in love with someone in society and didn't take the college entrance examination. She got pregnant and lost her child. After that, she killed her boyfriend and became mentally ill. The one who died was the female lead's half-brother. He had a beauty mark on his tear. He sang in a bar. He had thought about killing the female lead before. Later, after the college entrance examination, the female lead went to jail for the second female lead. Others came to see him. The dead boy had a mole on his face, similar to Guo Jingming's summer solstice.