With the start of summer comes a pair of daring, alumni-instigated challenges the Roman Club must take on. When an overnight investigation at an abandoned hospital leads to Kurumi and Hideo sharing an intimate night of heavy petting...little do they know they have company . . . in the supernatural form of a GHOST!

Kurumi makes Hideo quit her cold turkey for two weeks! Whatever is poor, horny Hideo to do? Well, for one thing, his club is visited by a masked OB for some hardcore "physical training." Then, there's a UFO-sighting field trip up to a mountain. But Hideo's never quite over his obsession with the precocious transfer student and he thinks he's gotten just a little closer to the object of his affection when he helps her catch a panty-thief. His reward? A trip to the movies... in handcuffs!

The "Roman Club," a school group interested in the occult, to which he's practically enslaved, has become boring for one Hideo Aiba. In fact, he finds his entire existence pretty tiresome until, one day, when a girl named Kurumi Sahana shows up and wants to join up. When the two are left alone in the club classroom, Kurumi makes a special "request" of Hideo, which makes him (understandably) freak out. Though he doesn't know what to think, one thing's for sure, Hideo's life just became anything but boring.

The annual festival marks the end of summer vacation, the last summer vacation Hideo will ever spend with Kurumi. And the last for the ex-prez as well, who will graduate at the end of the year. Eager to prove he still has leadership potential, the ex-prez pushes for one more Roman Club field trip. This time, Hideo and Kurumi aren't the only ones exploring each other in the dark...

The bond between Kurumi and Hideo grows stronger, as he struggles to learn even an inch of her past and understand her present situation. Meanwhile, Katsu and Kyouko's love-hate relationship starts leaning more heavily toward love when they share an accidental kiss on the lips!

More torture, teasing, and humiliation from Kurumi ensues, but Hideo's crush on his tormentor only worsens! When nasty rumors start flying about Kurumi's promiscuity, Hideo finds the source and sets things straight. But even he can't explain the mysterious pair of men's shoes in her apartment. Meanwhile, the Roman Club accepts a bet from the sneaky class president which involves wandering through a haunted graveyard and playing a creepy game of hide-and-seek in the school after dark. And the love bug launches a surprise attack on Hideo's Roman Club crony Tatsuya when he stands up for the buxom Kyouko who's sick and tired of being abused by her boyfriend.

Hideo is determined to prove his unwavering love and devotion for Kurumi. First, when Hideo gets sick with Kurumi's cold, she comes over to administer treatment in her own special way. The bond between Kurumi and Hideo grows stronger as he struggles to learn even an inch of her past and understand her present situation. Meanwhile, Katsu and Kyouko get closer-even sharing an accidental kiss on the lips! The Roman Club also goes on several adventures, including a trip to a mysterious shrine and another dare at the school at night.