At Yamaboshi High, joining a school club is required, so when Himeko, Iori, Taichi, Yoshifumi and Yui couldn't find a suitable choice, they decided to create their own: the School Culture Club! Together, they pass the days meeting and coming up with topics for the group's newspaper – that is, until one day, Yoshifumi and Yui proclaim that they switched bodies last night! Soon after, all five members of the gang find themselves inadvertently swapping at random, with no end in sight. What, or who, caused this supernatural phenomenon?
Haruka Kotoura has had a psychic ability to read minds since she was born, but her inability to grasp that she's different has led her to be ostracized by every friend she's made. When she meets Manabe, she can't help but be surprised - when he's not imagining strange creatures dancing through the desert, the boy is a hopeless pervert and makes no attempt to hide his dirtiest fantasies. What's more, Manabe isn't driven away by Kotoura seeing his thoughts, and even goes out of his way to befriend her - seemingly because he enjoys thinking of the girl erotically and seeing her subsequent embarrassment! Before long, the once-lonely girl even meets other students who aren't pushed away by her abilities. Could this be the start of a normal school life, with real, lasting friends for Kotoura?
After having lived elsewhere for several years, Sana returns to the town in which he grew up in, and quickly begins to reacquaint himself to his surroundings and new high school. While there, Sana runs into his four childhood friends: Shuu, Shuri, Aoi, and Nanaka; but for some strange reason Nanaka gives him the cold shoulder. As he goes about his new daily life, can Sana rebuild his friendship with Nanaka while trying to deal with a troubling secret from his past?
Both of these anime are about a series of strange events (bodyswitching, etc) that occur in a group of close friends. While Natsuiro Kiseki is lighter/more comedic and Kokoro Connect is darker/more dramatic, both amount to testing the strength of friendships through events that should be impossible.
Teiichi Niiya is a first year middle-school student at Seikyou Private Academy, an institution known for mysterious occurrences. The boy quickly finds these rumors to be true when he meets Yuuko Kanoe, a beautiful, mischievous girl who quickly takes a liking to him... and happens to be a ghost who seemingly no one else can see! Unable to remember anything about her past, Yuuko enlists Teiichi’s help to discover the truth, and together they join the school's Paranormal Investigation Club. With fellow memebers Momoe and Kirie, the pair will investigate the many strange happenings around campus, including the shadowy circumstances surrounding Yuuko’s death.