Haha! Mom knows how to shut them down! Words don't work with guys like that, got to show them the evidence! If the evidence happens to be big and brooding, all the better XD !
"Err... this is my daughter's... friend... and my friend." Yamadad is so precious.
Also, Kataoka Ken looks like kicked puppy. Thank god. I thought we were about to enter the NTR arc.