Reborn, the Female Emperor Master Became My Dao Companion

Mu Yunxuan was betrayed by the person he loved. To save him, his aloof master burned up her own lifeblood's Frost Source Crystal. Then time reversed, and the protagonist transmigrated into Mu Yunxuan's body. "With an aloof master who's cold on the outside but warm at heart, who needs a childhood sweetheart?" "After being reborn, of course I'm going to marry my master!"