This item is also seen in the canon Corpse Party games. You can find it here.
The Scented Beads, sometimes called Scented Beads Bottle or Old Charm (古びたお守り,Furubita Omamori?) or Yuka's Charm (由香のお守り,Yuka no Omamori?), is an item that appears throughout many different Corpse Party fan games.
In Corpse Party -ever after-, Ikaru Kajiura finds the Scented Beads Bottle inside the annex boy restroom in Chapter 2. It isn't used for anything and stays in his inventory for the rest of the chapter.
In CORPSE-PARTY if, Yoshiki Kishinuma finds the Old Charm (古びたお守り,Furubita Omamori?) inside the classroom 2-6. Yoshiki later shows it to a blue spirit in the 2F classroom who turns out to be Yuka. He tells her that Satoshi Mochida lost her charm while he was saving Akari Minamino in the science lab. It changes into Yuka's Charm (由香のお守り,Yuka no Omamori?). In the end, Yoshiki hands it back over to Satoshi and both siblings reunite.
In CORPSE-PARTY if PAST END, Yoshiki finds the Old Charm (古びたお守り,Furubita Omamori?) on the floor of the 2F north hallway, just after Satoshi unlocks the science lab door for him and disappears. After his encounter with Ayumi's corpse, he wonders if this charm could appease the quiet blue spirit on the first floor. Yoshiki and Akari head to the 1F west classroom and it is revealed that the blue spirit is Yuka. Yoshiki tells Yuka that Satoshi lost her charm while he was saving Akari in the science lab. Yoshiki will hold onto the charm to return it back to Satoshi and both siblings will reunite.