A female character strongly seems to use sex-appeal for getting what she wants at her job

A male character asks a female character "are you a virgin?" The female character starts freaking out, but the male character reassures her that he is not going to attack her.

One of the main character's uncle is slightly perverted.

A main character stands up in a bath, his buttocks are seen but for only about 2 seconds.

A main character is implied to be attracted to old people.