Ch 18
Ch 37 spanks once
Ch 24 Forgot chapter but Seme spanks ukes thigh and he cums from it. Ch45 seme spanks Ukes ass and uke almost cums
Story is meh, but the seme spanks the uke once in ch 18 / 19
Ch 18 smacks ukes ass saying his hole is so tight
Ch 19 seme smacks ukes aaa while fucking him from behind probably due to the uke begging him to fuck him harder
Ch 13 spanks once
Ch 39 seme is in a rut and spanks the uke when he tries to touch himself and cum
Ch 10
Ch 4
Ch 34. Short panel in an extra at the end of the chapter. Uke wakes up to seme fucking him and spanking his ass over and over
Uta no Prince-sama dj - Ookami Shounen