Rei is a 17-year old professional shōgi player, who lives by himself, not having a real family, and has scarcely any friends. Among his acquaintances is a family, which consists of a young woman, Akari, and two young girls, Hinata and Momo, and who also keep a numerous number of cats.
Kimichika Haijima was a strong junior high school volleyball team member. After getting into trouble with the team, he moved to his mother's hometown and reunites with his childhood friend, Yuni Kuroba. The two become an ace pair at volleyball, but in their last tournament, get into a big fight. Will they ever play volleyball together again?
Nadeshiko, a high school student who had moved from Shizuoka to Yamanashi, decides to see the famous, 1000 yen-bill-featured Mount Fuji. Even though she manages to bike all the way to Motosu, she's forced to turn back because of worsening weather. Unable to set her eyes on her goal, she faints partway to her destination. When she wakes up, it's night, in a place she's never been before, with no way of knowing how to get home. Nadeshiko is saved when she encounters Rin, a girl who is out camping by herself. This outdoorsy girls story begins with this first encounter between Nadeshiko and Rin.
Kobato decides to become an honest, humble citizen after enduring a bitter experience known as “wisdom work.” He forms a pact with Osanai, his classmate with the same goal, and they plan to enter high school leading quiet lives. But for some reason, inexplicable events and disasters keep happening around them. Will Kobato and Osanai ever manage to live ordinary, peaceful lives?
In this world, creatures like vampires and werewolves still walk about, but Aya Rindo can’t say the same for herself. This beautiful disembodied head, carried by her maid Shizuku Hasei, is a detective in search of her stolen body. One evening, they meet half-human Oni Slayer Tsugaru Shunichi, who offers a lending hand. Now, the trio is traveling through Europe, solving mysteries along the way.