The Fruit of Evolution: Before I Knew It, My Life Had It Made Vol. 3 (Light Novel) — Miku

After clearing the Black Dragon God's dungeon with the help of the beautiful adventurer Altria, Seiichi and Saria are accepted into the Guild as full-fledged members. Not long after starting his work, he decides to buy a horse, but takes a liking to Lulune the donkey instead. That's all fine and well—Seiichi ends up registering his new steed in the great Capital Cup Derby! Meanwhile, the country his classmates were summoned in—the Kaizell Empire—begins moving in the shadows, and the demonkin of the Demon Realm reply in turn...The third explosive volume of The Fruit of Evolution has finally arrived!