～Become the strongest with the ultimate internal ejaculation～ Ten men suffering from premature ejaculation are gathered at a certain location in Tokyo. A one-night-two-day improvement program retreat filled with love by 'つぼみ'. Endure, endure again, and train your penis until it's worn out. The winner gets the reward of raw insertion & internal ejaculation into つぼみ's vagina! Who will master the tips taught by つぼみ amidst the storm of semen explosions and uncontrolled orgasms, and experience the pleasure of internal ejaculation!?
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