Do ratmen dream of the sacred tree of spirits?

Transmigrated into the body of a servant's son in an elven noble family, Fafnir, with rat-man blood flowing through his veins, was still scrubbing floors at the age of seven. He'd wipe the 150-step corridor several times over. Fortunately, he looked human, and overt discrimination was forbidden by law. Every night before falling asleep, Fafnir's mental "ledger" would automatically open. The words he'd memorized through countless sleepless nights, the bookkeeping skills he'd learned, all transformed into full progress bars. Until the butler accepted the three gold pounds his parents had saved for two years and shoved him onto the carriage to grammar school. He didn't know what awaited him at grammar school. But at least, he finally had the chance to look up at the legendary elven sacred tree.