Lord Frieza is many things: a master of cruelties, the self-proclaimed emperor of the universe, perhaps the most feared being in said universe besides Beerus. For his participation in the Tournament of Power, Goku promised to wish him back to life with the Dragon Balls if they were victorious. Frieza had even stooped to actually fighting side by side with his nemesis to achieve that goal.
However, he neglected to specify that he keep his old body in the process.
Now, he finds himself in the most horrifying situation imaginable: being forced to learn about friendship as an adorable little colt. Strap in, folks.