A risky promise (Patreon)

How it can be possible that prof. Onsen Mark is fucking the legendary erotic dream of all Tomobiki high-school, the gorgeous nurse and miko Sakura?
He promised her a life-time supply of gyudon from Tomobiki's restaurants!
Considering the huge appetite of the beautiful woman, he knows that the promise will leave him penniles, but the heavenly feeling of plunging his dick into Sakura's pussy worths every bill he will sign to fulfill the debt.  

Based on "Urusei Yatsura" manga/anime show.

Line art, clean and wet version included.