Kyotaro Kakei has always had an affinity towards books in hopes to find answers to his life. With a mentor's promise, he continues to search for a book with his absolute hope. However, this changes when he receives a foretelling message saying that "Today, something will happen that will change your fate. --From the Shepherd." Due to this premonition, his normal school life at Shiomoi Academy becomes entangled due to the optimistic Tsugumi Shirasaki and the Shimoi Happy Project.
After receiving a text from the "Shepherd", Kakei gets has a sudden intuition that the girl he saw handing out posters is in danger and runs back to pull her out of the way, however they trip and Kakei accidentally gropes her breast, resulting in the news spreading that he is a molester.
Kakei and the others start their Shiomi Happy Project activities by picking up trash and find a beautiful tuning fork...
Kakei and Suzuki get help from the genius of the cafeteria while Shirasaki and the others pay the Song Princess a visit…
The Library Club members don costumes to advertise Appllio's Spring Fair and then take a trip to the bathhouse to get to know each other better…
The Library Club starts getting more jobs, but this spike in popularity has its drawbacks... Meanwhile, Kakei zeroes in on the Shepherd's identity.
Kakei finally pays a visit to the magic library from his visions and learns more about the secrets of the Shepherds.
The girls of the Library Club invite Kakei out on a group date, but Kodachi has Shepherd work for him even on his day off.
Suzuki writes a play for the Library Club to perform, but will circumstances force her to confront her true self...?
As the Library Club prepares for the festival, Misono thinks back on her life of singing and decides what she wants for the future.
More is revealed about Kakei and Kodachi's past, and Kakei meets Shirasaki's little sister while Kodachi causes trouble.
The Happy Project's Minafes goes head to head with the student council as Kakei makes his decision about being a Shepherd.
It's finally the day of Minafes and the symposium. Which will get more people? Will Kakei be able to save Shirasaki?
