One year ago, a UFO containing 150 aliens crash-landed off the shores of Kasai. Because no one could fix their ship, the Japanese Government decided to bestow upon them the designation "DearS" and make them into Japanese citizens, teaching them the language, customs, and culture of Japan. However, in order for them to become more familiar with human society, a home-stay program has been enacted to allow them to mingle with other humans. One misty morning, a truck carrying a capsule that housed one of these aliens ends up dropping it into the riverbank, releasing her from her confinement. She is eventually found by a high school student named Takeya Ikuhara, who saves her from being hit by a truck and takes pity on her, despite being extremely distrustful of their race and wanting nothing to do with them. Upon being named Ren, she imprints upon him as her "Master" and serves as his personal "Slave," leaving him with a "DearS" who wants to remain with him no matter what and bringing his ordinary, alien-free days to an end.

Shinichi Chiaki is a first class musician whose dream is to play among the elites in Europe. Coming from a distinguished family, he is an infamous perfectionist—not only is he highly critical of himself, but of others as well. The only thing stopping Shinichi from leaving for Europe is his fear of flying. As a result, he's grounded in Japan. During his fourth year at Japan's top music university, Shinichi happens to meet Megumi Noda or, as she refers to herself, Nodame. On the surface, she seems to be an unkempt girl with no direction in life. However, when Shinichi hears Nodame play the piano for the first time, he is in awe of the kind of music she creates. Nevertheless, Shinichi is dismayed to discover that Nodame is his neighbor, and worse, she ends up falling head over heels in love with him. [Written by MAL Rewrite]

Clannad: Mou Hitotsu no Sekai, Tomoyo-hen is set in an alternate reality where Tomoya Okazaki dates his junior, Tomoyo Sakagami. Tomoyo has been elected to be the school's next Student Council President. This is great news as she can now work toward her goal of preventing the school's cherry blossom trees from being axed. Although Tomoya is ecstatic for her, given his reputation as a delinquent in school, his relationship with Tomoyo is making them the subject of gossip around the campus, which can potentially compromise her standing as Student Council President. The school community's disapproval of their relationship becomes more apparent when the Student Council's Vice-President and even the school's administration warn Tomoya to distance himself from Tomoyo. With the bad atmosphere widening the rift between Tomoya and Tomoyo, will Tomoya succumb to societal pressure and do as they say, or will their love for each other rise above it all? [Written by MAL Rewrite]

The countdown to extinction begins on Sunday with the arrival of the Septentriones, otherworldly invaders set on the eradication of mankind. Caught in the crossfire, Hibiki Kuze and his friends join in the war for humanity's survival by signing contracts with demons to become "Devil Summoners." Soon, their abilities attract the attention of JP's, an underground agency led by Yamato Houtsuin. Once recruited into JP's, Hibiki and his friends fight and bond alongside other ordinary citizens who are Devil Summoners. However, with each new day, another Septentrione appears to wreak havoc upon Japan. Even if many lives are lost in the process, before that night ends, the young summoners must defeat the invaders at all costs. [Written by MAL Rewrite]