Battle Through the Heavens: The Unorthodox Sign-In System

After transmigrating into Battle Through the Heavens as Xiao Yan's third older brother, Xiao Jin planned to use his foresight to rise to the top. Unfortunately, his golden finger had other ideas. As long as he kept signing in and completing the System's missions, he could continuously obtain treasures. Decades later, after Xiao Jin had become a mighty powerhouse, he looked back on his past and realized that his System really did deserve to be called the Not-So-Proper Sign-In System. P.S. Xiao Yan is not a transmigrator in this book. The two brothers don't fawn over each other or sabotage each other. There are multiple heroines, with a slight focus on romance.