Magatama Idol Kaguya explains:Edit
"What the-!? This is no normal Magatama! Something has corrupted and altered its properties. I can feel some kind of overbearing pressure from it...like your waifu hooked up with someone else and they're going around showing off how in love they are and it just reminds you how you're a lonely nerd with zero social skills and stuck in your parent's basement."