After getting a little jealous of Sernia, Tomomi decides to pro-actively ask Akiharu out on a date. As they go around town, Sernia follows them closely behind, stalking the two of them in full-blown tsundere mode. Tomomi tries to make a move on Akiharu, but Akiharu is suspicious because every time she's acted nice before it's always ended up embarrassing or humiliating him in some way.
A flashback reveals that it was Tomomi back in kindergarten who told an impressionable Akiharu that he could be a great "bride" if he worked hard enough, so when he said his dream was to become a bride (see Ep. #1) the entire class, including Tomomi, laughed at him for it. The trust between the two of them has had a gap ever since.