How the Tables Have Turned: My Master Was Raised by Her Beloved Disciple into a Proud Phoenix

To revive his beloved disciple Alisa, who died taking a blade meant for him, the strongest magic swordsman, Zieg, makes a deal with the Seventh Demon Lord, Scarlet Moon. But when he gives up his power, he also turns into a petite, white-haired little girl named Shiro.

Dude, how am I supposed to be her master looking like this?

Shiro is forced to flee to a remote town, but Alisa tracks her down, drawn by the scent, and mistakes her for her master's new lover. Alisa nearly kills her, but Shiro manages to defuse the crisis and ends up being taken on as Alisa's new disciple.

Wait a second. Is something not quite right here?

How did I, the master, end up as my beloved disciple's disciple?

The sword techniques I taught my disciple, she's now teaching back to me. Does that make any sense?

And are you sure I'm your disciple and not your pet? Training is one thing, but why do you keep touching me? Is this how you treat your master?

Don't get so forward with me! I'm the master here!