Yuu (human) and Huge (demon) opened a store together but Yuu keeps on going out at night. Mori no Koe - Main Series Hada no Ue no Renai Jijou (Side Story) Ichido Dake no Uta (Side Story) Mori no Koe dj - Nettai No Mori (Spin-Off) Mori no Kurashi (Alternate Story) Yurusareta Uta - somewhat related
Read it like this: 1) Mori no Koe or Itsuwari no Moe (It contains the same chapters) 2) Mori no Koe Dj - Nettai no Mori (One-shot: Vim & Alcan) 3) Mori no Kurashi (One-shot from Yuusa and Hugh) 4) Yurusareta Uta 5) Ichido Dake no Uta 6) Dokunoaji
additional oneshot for the mori no koe series featuring yuusu and his oni servant. main story: (pls see my review to know which chapter they appeared) See more at: http://www.mangago.me/read-manga/itsuwari_no_mori/#sthash.AL6YcFrO.dpuf