The root is attached around here

Body Length Comparison

For the girls who excel in Senshadou, it's not at all rare for them to be effected by senshaBYOU (tn: “Tank sickness”) and end up carrying the weight of a futanari penis that FAR exceeds the average adult male in size. Even so, for the size to be something this huge is obviously completely out of the ordinary. Despite carrying something so imposing and impressive between her legs, she's surprisingly oversensitive and a premature ejaculator. Even if she could somehow reduce her penis size to something more sane, as a tool for making females gasp and moan, as long as she can't hold her cum, it still fails. It's nothing but a burdensome white elephant. Her oversensitivity only grows stronger and stronger toward the tip of her penis, but even near the root where the sensation is weakest, it's still as sensitive as a normal clitoris. The deep red portion of her penis, extending back from the corona for dozens of centimetres, which only comes out of her foreskin when she's fully erect, is especially oversensitive. It's such a weak point that lightly tracing a finger along it is enough to make her scream and spew out a huge quantity of semen. Even if it isn't the painful kind of weakspot, having such a large oversensitive region exposed would make it impossible to have a decent match. The sight of her getting an erection during practice or matches, and becoming the target of warnings and punishments, has already become a famous scene not just around Ooarai, but in the whole world of senshadou and has won her many hardcore fans. (Though the person in question seems to absolutely hate her own fame)