Megumi is alluding to the fact that Hiroki has three women after his affection, Ruri, Akira , and Megumi. Hiroki is so rapt up in the family business, that he is clueless about romantic relationships, or how to pay attention to the romantic feelings of women, or even how to interact romantically with the opposite sex, so it can be said that he is a clueless idiot when it comes to women, the three girls are going to have a hard time training him.
Megumi is alluding to the fact that Hiroki has three women after his affection, Ruri, Akira , and Megumi. Hiroki is so rapt up in the family business, that he is clueless about romantic relationships, or how to pay attention to the romantic feelings of women, or even how to interact romantically with the opposite sex, so it can be said that he is a clueless idiot when it comes to women, the three girls are going to have a hard time training him.