After gaining the title of the strongest warrior in the world, Peter Grill has finally proven his worth and is ready to take the hand of his beloved senior, the beautiful and innocent Luvelia Sanctos. Peter expects to have a healthy relationship with her, despite some objections from her father. Unfortunately, this dream quickly breaks apart as news of his grand victory spreads among the womenfolk of other races—ogres, orcs, elves, and others—some of them even vying for his seed to produce offspring blessed with his might. To avoid betraying the trust of his cherished Luvelia and causing a scandal, Peter strives to avoid other women's salacious advances. However, accomplishing such a feat with so many alluring women on his trail is easier said than done.

The stage is Ayanagi City, a city near the Japan Sea. It is a futuristic city that was built to carry out the recovery from the calamity caused by the Apathy Syndrome ten years previous. High school student Shin Kanzato with his little brother Jun, meet with their elder brother Ryou, who is the chief of the Ayanagi City Police, again after ten years. At that time, a series of strange incidents happen in Ayanagi City such as the crew of a submarine that suddenly disappears while in their submarine, or a spiritless symptom which disturbs the world after ten years, or the case of the inside out corpse where a student took on a cruel appearance. Ryou tracks down the organization behind the string of incidents, and having become involved in the incidents, Shin awakens the Persona. (Source: Wikipedia)

In the year 2027, the video game Phantasy Star Online 2 is all the rage at Seiga Academy. Every student is on board the fad—except for Itsuki Tachibana, a well-rounded student who doesn't play video games. Due to its popularity, the game is currently under review at Seiga Academy to see if it has a negative impact on the students. Consequently, this causes Itsuki to catch the attention of Rina Izumi, the perfectionist student council president who aims to prove that the game is not to blame. To accomplish her objective, Rina recruits Itsuki as the student council vice president and tasks him with learning to play the game while keeping his grades up. Now obliged to report his daily findings of the game to Rina and analyze its merits, Itsuki carries the fate of Phantasy Star Online 2 in his hands.

After centuries of antagonism and misunderstanding, the Japanese finally welcome youkai into their community. In an attempt at species integration, normal children begin attending school with paranormal creatures who are quite humanoid. Shingo Ohashi finds himself developing feelings for Hatoko Petoko Fujimura, a half-youkai half-human girl whose powers are: uncontrollable cuteness to enchant those around her (similar to a low-power succubus), get stuck to any other person who touches her bare flesh (cured by her falling asleep), and the ability to disappear even at the molecular stage (which she can for the most part control). (Source: The Anime Encyclopedia)