ナズさんはおうちまで電車で帰れる自信がないそうなので、
ヤマメさんは翌日・翌々日のコミケットスペシャルに出るためにうちに１日だけ泊まりました。

Naz-san didn't seem confident about being able to get home by train, and Yamame-san was going to Comiket Special the next day and the day after, so they stayed over just one night at our place.