There wasn't much of one, but the triplets promising to marry the triplets back home with the exact same hairstyles shattered any inkling of a suspension of disbelief for me.
Thigh Hero managed to strike a nice balance between his fetish and the story but Abs Hero's fetish is so overpowering, it's smothering the story. At least they're lampshading it, having every other character practically begging him to stop.