Girl, of course it's suspicious. Try to remember that he's hot for you and can only "date" you until you find a marriage partner. Connect the dots, please~
In other news, I really like Tamako's outfits. They feel really fresh and trendy and not so "Uniqlo-basic" or OL-feminine like other josei leads tend to wear, and they look so comfortable. I have a feeling the outfits are what I'm really here for XD