Interstellar Rank-One Potion Master

In the year 9932 of the Interstellar Era, humanity is undergoing genetic repair. People must regularly inject themselves with genetic repair medication to prevent their genes from collapsing and keep themselves alive. In other words, everyone has become an addict. The pharmacist profession has suddenly become the most lucrative career in the galaxy, and pharmacists are ranked in nine grades. Valen, who is determined to become a Grade One pharmacist, buys an unregistered slave from a remote planet one day to use in his experiments. But he discovers that the slave might be useful for something much better! Couple dynamic: A cunning, twisted, sharp-tongued bottom vs. a proud early on, then darkened, general who has transmigrated from ancient times to the future as the top