Sci-Fi Anime

Ageha Yoshina is a self-confident high school student who helps others for a fee. On his way back from a job, he finds a strange calling card with the word "Psyren" imprinted left behind in a phone booth and decides to keep it, unaware of its purpose. The very next day, Ageha discovers that his classmate Sakurako Amamiya has the exact same calling card in her possession. When he questions her, Sakurako asks him to save her, signaling the day his troubles begin. Confused by the circumstances of this encounter, Ageha realizes something is wrong when Sakurako goes missing. In an attempt to figure out what is happening, he decides to call the number provided on the calling card and is asked a series of questions by a mysterious voice, ending with a final, cryptic question: "Would you like to go to Psyren?" Thus begins two teenagers' participation in a game of life or death within a strange world inhabited by monsters called Taboo. Granted the ability to use psychic powers known as PSI, the duo fight to return to the place they call home.

Sato Takahiro was an ordinary office worker and hobbyist gamer until the day he woke up on a spaceship–one that strangely resembled a craft from a favorite space-shooter game. With a decked-out ship, a crew full of babes, and a fantastic universe to explore, he's going to make the most of his good luck and create the life he's always dreamed of! (Source: Seven Seas Entertainment)

Akira Toudou, a high schooler living in northern Okinawa, lives peacefully with his mother and his older sister, Haruka. However, behind their peaceful life lies a secret passed down through their family: Haruka has inherited a mysterious power from their father, known only as "Engine," and she has lived her life hiding this power from others. Akira, however, inherited nothing. He harbors an inferiority complex due to his own weakness. Then, strange events began to occur all over the world. What is the purpose of the unknown enemy closing in on Akira and his friends? Now, with the fate of the universe at stake, a brother who has nothing and a sister who has everything must find out what they can really do together. (Source: MAL News)

Second TV (flash animated) series of Keroro Gunsou.