Do I Have to Become a World-Destroying Witch Too?

“Yuanzhu, what do you think we are?” “Doomsday witches!” “?” 【The true identity of the female professor before you is a doomsday witch. Investigate why she has infiltrated the First Magic Academy of the White Spring Kingdom. Reward: Wood Magic, Wood Escape.】 【The true identity of the woman across from you is the Witch of Night. Kill her in the sunlight before she can act. Reward: Dark Magic, Shadow Bind.】 【The true identity of the woman before you is the Witch of Dawn. She toys with people's feelings. Pursue her, then cruelly dump her. Reward: Shadow Cloak.】 When Yuanzhu stood in front of the mirror, he saw a line of text light up above his own head: 【The man in front of the mirror is the true culprit behind the world's destruction!】 What?! Am I a doomsday witch too?!