Ann OST - Counting Notes

Composer - Yakikaze (Devlin Bataric)
https://soundcloud.com/vixx_suramu/sets/ann

Original Soundtrack from "Ann" by Rong Rong: https://store.steampowered.com/app/1511270/Ann/

Disclaimer: I do not own the rights to the music or picture; all credit goes to individual composers and artists.