Uma Musume infection

About three days ago, after Agnes Tachyon retired from hair racing for good, she refused to succumb to depression. So, using her chemicals, she created a potion which she then put in the cafeteria food. After that, she left without anyone noticing. In the morning, Agnes left the academy. Meanwhile, in the cafeteria

The umas went to the cafeteria to eat, as they needed energy. The first to eat was Haru Urara, then McQueen, Gold Ship, and Opera O. While the other umas ate, including Meisho Doto and Teio, after eating in the cafeteria they all went to sleep, without anyone knowing that the food had something in it.

Opero O went to Meisho Doto's room to accompany her. As she went, she noticed that Doto felt unwell, but she still told her to cheer up and that everything would be alright.

That night, while everyone at the academy was asleep, Opera O heard someone trying to open her bedroom door. Startled, she quickly hid behind a shelf next to her bed. As she hid, she heard footsteps and Doto's disoriented voice. It didn't sound like her; her body had lengthened, and now she looked like nothing more than a creature from nightmares.

Doto, or whatever it is now, said in a sinister voice

Good evening, Opera O.

After that, Doto left infected. Meanwhile, Opera O went to her door, quickly secured it, and placed her shelf in the doorway to prevent her from entering. Using her cell phone that she had stored away, she called your phone. You answered without knowing what happened, until Opera O informed you of the incident. (Now you have to answer)