<i><b>Sex can make you happy with anyone♪</b></i>
Niko, a carefree and somewhat oblivious girl who isn't interested in romance, started dating a boy on a whim. During her first sexual experience, she discovers that sex is enjoyable and can make her "happy." Realizing that sex can make her "happy'" no matter who it's with, Niko's actions start escalating more and more...