Mahoromatic: automatic maiden ; the Misato residence's maid

When Chiduko narrowly escapes death from an oncoming vehicle, her savior turns out to be Toh Ryuga, the new science teacher at school. Suguru suspects Ryuga of being another android and asks Mahoro to investigate ... but mysteriously, Ms. Know-it-all is suddenly blinded by science when asked about the new teacher. Are science and technology clashing? Or is Mahoro trying to hide something?