After retiring, I became Loli’s magic mentor

Introduction: Ryan accidentally swallowed the memory of a time traveler when he was young, and then entered the Knights and became the leader of the "Eclipse" Knights. After completing his duties in the Knights, Ryan just received the news that his adoptive father was seriously ill. After meeting his adoptive father for the last time, Ryan took over his adoptive father's work in accordance with his adoptive father's will. But... the adoptive father's job is actually Miss Loli's personal butler? Nenelli Aki, nine years old, daughter of an earl. Although this blonde lady is very cute, she is a bit arrogant. At this point, the daily story of a top knight who transformed into a personal butler and an aloof and closed-off tsundere loli lady begins.