My daughter Mika came home with her boyfriend Hajime. The mother welcomed the polite young man with a smile. The mother brought some delicious sweets and tea to her daughter's room... and there she saw her daughter and her boyfriend doing something called "fitting and measuring for a costume to be used at a club event." The mother watched them with a smile, but her eyes were drawn to the brave figure of "unexpectedly huge penis" that was peeking out from the side of the crotch of the boyfriend's costume...!