Takato Saijou has held the title of "Sexiest Man of the Year" for five years running. He is an accomplished actor, with 20 years of experience under his belt, and is aware his good looks are well above average. Proud of his career, Takato regards the title as an appropriate indicator of his success. But when his reign is ended by acting newbie Junta Azumaya, who debuted only three years ago, Takato's initial shock gives way to jealous hostility. Even in the new drama that he has been cast in, Junta seems to have suddenly surpassed him; snatching Takato's usual spot of lead actor, Junta continually manages to get on his nerves. Most infuriating of all are the bright smile and kind words that accompany everything Junta does. All this animosity comes to a head, however, when Junta catches Takato in a rather vulnerable drunken state. Endangering his own public image, Takato confronts the junior actor with harsh words and angry comments—an opportunity Junta takes every advantage of. With the famous actor Takato Saijou now on video picking a fight with a co-star, Junta has the perfect means to blackmail him. Asking the price of his enemy's silence, Takato is shocked to find that his motivation lies far from advancing his career; instead, Junta's terms are those that can only be realized in the bedroom! [Written by MAL Rewrite]

Haruki Nakano lives an average high school life, except for the fact that his mother is overseas and he shares an apartment with his four sisters. There's the oldest, Mutsuki, who has a bad habit of falling asleep in his bed, the junior high school student Yayoi, who hits him whenever something happens, and then the grade school twins, Uzuki and Satsuki, who love to play pranks on their older brother. Stuck in a house with four girls, Haruki has to deal with all sorts of trials. From going grocery shopping, watching scary movies, to kissing practice, life is never boring in Danchigai!

Thirty years ago, the Eurasian continent was devastated by a supermassive "spatial quake"—a phenomenon involving space vibrations of unknown origin—resulting in the deaths of over 150 million people. Since then, these quakes have been plaguing the world intermittently, albeit on a lighter scale. Shidou Itsuka is a seemingly average high school student who lives with his younger sister, Kotori. When an imminent spatial quake threatens the safety of Tengu City, he rushes to save her, only to be caught in the resulting eruption. He discovers a mysterious girl at its source, who is revealed to be a "Spirit," an otherworldly entity whose appearance triggers a spatial quake. Soon after, he becomes embroiled in a skirmish between the girl and the Anti-Spirit Team, a ruthless strike force with the goal of annihilating Spirits. However, there is a third party that believes in saving the spirits: "Ratatoskr," which surprisingly is commanded by Shidou's little sister! Kotori forcibly recruits Shidou after the clash, presenting to him an alternative method of dealing with the danger posed by the Spirits—make them fall in love with him. Now, the fate of the world rests on his dating prowess, as he seeks out Spirits in order to charm them. [Written by MAL Rewrite]

Spirits are otherworldly entities with immense power, capable of creating spatial quakes whenever they appear. One way of dealing with them is through brute force and killing them... or making them fall in love and sealing their powers. Having sealed three Spirits, Shidou Itsuka continues his mission with Ratatoskr in locating more spirits and dating them, to ensure the world's safety from further destruction. However, this time around, their problems will not be limited to Spirits as a more imposing threat seems to have noticed their activities. [Written by MAL Rewrite]