Qianqiu's World summary:

After the 16th playthrough, Qianqiu finally realized that the world she was living in was just a game. However, she was not the heroine, and was destined instead to be the loser, the second female lead. Getting tired of being stuck in an endless loop, she decides to break free from the game's plot. However, in the process of doing so, the protagonist also appears to be gradually going amiss?