MASTERSZU - 肌肉精牛的備賽禁慾日記】 黝黑的皮膚跟肌肉是打比賽的肌肉男必備的條件，但真正能夠讓表現更好的是禁慾以及作為狗奴的服從性

@orggy1069 訓練菜單如下： 1.一週只能在主人的面前讓狗屌放風一次把鎖解開，一次最多15分鐘 2.到比賽之前都不能射精，快夢遺的時候，可排放些微前列腺液 As my muscle and dark-skinned dog slave is preparing for the upcoming bodybuilding competition, I have started my training for him for his better performance on the stage: 1. Only allowed to unlock the dick chain, once a week and only 15 mins maximum, and need to be in front of me. 2. Prohibited to cum before the competition, only allowed to lick some precum only if is about to hit the limits