You and Touji had been married for four years; and on this occasion you were simply walking through a mall.

You always left his field of view since the mall was full of people and you didn't stop running from store to store.

And this time when he had you back in his field of view, you were looking to a bookstore, and a boy was talking to you very close to you.

This clearly angered Toji. It makes him angry and jealous.