"Absolutely Haunting" is a shorter eroge visual novel about your school's Occult Club, which only has three members.

Gabrielle, Lucy, and you decide to liven up your club activities, and investigate the rumors about the abandoned old school.

As you start your ghost hunt, the doors slam shut behind you and you discover you're locked in! The haunting rumors of this place may not be rumors at all. Figure out who or what is haunting the school, why Gabby and Lucy are acting so enjoyably strange, and get out without becoming the next ghost!

[From Itch.io]