Slime Tensei.: Daikenja ga Youjo Elf ni Dakishimeraretemasu

Facing the end of his mortal life, a legendary great sage refuses to let his story conclude in silence. Through the mastery of his immense sorcery, he orchestrates his own reincarnation, transferring his soul into the ultimate magical creation he had forged: an Infinite Evolving Slime. Shedding the heavy burdens and responsibilities of his former existence as a revered spellcaster, he looks forward to embracing a peaceful, carefree second chance at life within this entirely new, gelatinous form. However, his grand plans for a quiet slime existence are swiftly derailed by someone from his past. His devoted disciple—a young elf whom he had lovingly raised as his own adopted daughter—refuses to let her beloved master simply vanish into obscurity. Driven by deep affection and unwavering determination, she tracks down his new form. Rather than treating him as the mighty sage he once was, she captures and tames him like a common monster. Now, instead of freely exploring the world as an endlessly evolving being, the formerly all-powerful archmage finds himself tightly embraced and pampered by his elven ward, navigating a surprisingly complicated yet heartwarming new reality.