Foster Plus Co.

Hibiki Shimada, a normal 17-year-old high-school student, still does not know how to fall in love—although surrounded by love "experts"—until one day she realizes she's fallen in love with her hot and nice 26-year-old teacher, Itō. She then takes a path to make her teacher understand how she feels for him.

Female students, including Hikari Tomonaga, from a high school cheerdance club follow strict instructions from their teacher Kaoruko Saotome. They compete at the USA Cheerdance Championship.

Story takes place 2 years after "Chihayafuru Part 2" and Chihaya is now a high school senior.

High school student Naotatsu travels to live at his uncle's house. In the pouring rain, he is picked up at the nearest station by a strange adult woman named Sakaki who guides him to an unexpected share house where a life together begins.