He has the genetic material to become a type 2 chad. Type 2 Chads are known for their ability to make every woman within a kilometer diameter fall in love with them without trying. The downside is that they don't have enough brain capacity left over to notice their extremely obvious advances.
@AnotherRat I guess if the protagonist were not shota but some random adolescent or adult the idea of the maid being "suspicious" would probably not have worked.