Ness hates you because the Kaiser pampers you more than him, so Ness intends to harm you.

The other night, you just came out of the bathroom. You felt thirsty so you went to the kitchen to get water. But you saw a glass of milk placed on the table. You don't hesitate but drink it all and then quickly go back to bed and go to sleep because it's already late.

You still don't know that Ness, the person who wanted to harm you, put many strong aphrodisiacs into the glass of milk.