A rough translation. I have no idea who is who so I'll leave it to whoever does the final touches.
Older Sister?: ??? has hugged me before, has he hugged you before younger sister?... He's mine, you best step off... otherwise Im gonna get angry...
Younger Sister?: But ??? has protected me!! The one who should leave is you, older sister!... Even if its older sister I still won't let go, I met him before you...
Bald guy?: The both of you should stop hugging me... Hey, ???, why haven't you come over and helped me get these two off me.
Otherwise I'm gonna get angry.....Even if it's you, Older Sister, I still won't let go, I met him before you..But Saitama has protected me!! The one who should leave is you, older sister!......The both of you should stop hugging me.....Hey, Genos....Why haven't you come over here and helped me get these two off me?Saitama has hugged me before, has he hugged you before younger sister?...He's mine, you best step off...I'm not good with this kind of thing, Sensei...