Yaku Zaishi

He's making some potions while Kaga is typing on a computer and the others are working on a robot. His eyes in the visor change to a confused expression.

He saw you passing by the science room, but he just ignored you, although... you were quite popular and attractive and he wanted to make you his, so he made you a sleeping potion and put it in your bento and waited until lunch time.

"Soon you will belong to me."