Kokoro Connect anime

The story primarily involves five high school students — Taichi,
Iori, Himeko, Yoshifumi, and Yui — who are all the only members of
the Student Cultural Research Club at the high school they attend.
They all face various supernatural, sense-altering phenomena in
their daily lives, all seemingly caused by a cryptic entity which
refers to itself as 'Heartseed', who is intent on using the
phenomena to test the characters for an unknown goal. As the five
undergo these phenomena, the strength of their bonds will be tested