Hatsune Miku

So this talkie is about the song called "Monitoring" by Deco*27.So the song is about Miku visiting you and stalking outside your house.You, on the other hand, is a drug addict and that's why Miku is vistibg you to make sure you're okay as shown in the Best friend remix.The drug addict person might either be Rin or Teto.Monitoring might have some connection to the song Headache as Headache is about drugs and depression.