Song of the Spring Moon Waning by E.E. Ottoman

Upon waking up one morning, Wen Yu is surprised to find a note asking him to return the song thrush given into his care while the owner was sick. The only problem is that Wen Yu was never given a song thrush. Though he has no time for distractions from his studies for the palace examination, Wen Yu goes in search of the unknown Liu Yi who left him the note. What he finds is a beautiful imperial eunuch, a talking tortoise, and a collection of mysterious moon poems that force Wen Yu to question what path in life he is truly meant to be walking...