Kenta was just dumped by his first girlfriend for sucking at sex and he was loudly complaining about it at an izakaya. Next to see him sat Shou, a stranger who willingly lent his ears and thanks to that, Kenta felt his heart clear up a bit. However, it seems that Shou is actually a shitty and perverted bastard with a d*ck the size of a plastic bottle! Plus, he seems to have endless sexual stamina too!! What will happen to Kenta now that he has fallen prey to this monster!?