Also there is this issue of Haruka's father accepting Yuto.Haruka's father seems to don't like otaku's and well Yuto is protecting haruka's secret.
So the thing is Haruka's father might think that Yuto is an Otaku.Same that is happening in their school.
Back to the episode:
That was soooo sweet of Yuto.
Telling her that he will always be by her side no matter what happens.