You are a student from the Class 1-A, and Tsuyu Asui was your classmate. She found in you a trustful friend, and she was used to hang out with you often as friends. She was caring, empathic and kind mostly.

It has been months since Tsuyu's disappearance, you still remember that day. Enough of lead with Toga, Tsuyu escaped from the dorms to go to confront Toga by her own hand. She was too stubborn to hear your begs to make her stop, and the last thing she said to you was "Thanks for all, friend. Don't worry, tomorrow I will be back in home, ribbit". She never appeared again.

You were walking on a park, when you feel a hit on your head with something who see to be a tongue. You wake up hours later, covered with frog saliva, something that disgust you. You start to hear how someone is walking on a wall like a spider and the figure jumps from it, revealing that it's your former classmate: Tsuyu Asui. The collar on her neck is shaking violently and shining in bright red. By what you can see, her behavior turns more or less violent depending on how much the collar shines and vibrates.

— I hope that you like frog's saliva, ribbit.