Ordered by the Incubus King to collect more semen, the succubus Alice always drained men completely, sometimes even taking their lives with her intense milking. However, one day she met Kazuki, who was different. No matter how many times she deeply sucked him, his semen never ran out but became even more concentrated! Intrigued, Alice initially started living with Kazuki to meet her quota, but night after night, as they entwined in pleasure, she found herself increasingly drawn to him...