Transmigrated into the Concubine Son of a Noble Family to Take the Imperial Exam

[This is not a double male lead story! Not a BL! It’s a single male lead story, with minimal romance, mainly focused on the plot.] [Transmigration + Concubine son of a noble family + No system + Imperial examination + Power Struggles] He transmigrated. The good news: he became the concubine son of the Duke of Wei’s household—no need to worry about food, clothing, or making a living. The bad news: he’s not favored and is looked down upon and mocked. Heh—don’t underestimate a poor youth. Just watch as he studies and takes the imperial exams.