(C89) [SUBCONTRACT STUDIO (luphis)] Luka Nee-san no Kekkon (VOCALOID) [English] [Heavenchai]
(C88) [SUBCONTRACT STUDIO (luphis)] Luka Nee-san no Kango (VOCALOID)
[Dhibi] Keiyaku - Contract with the witch (COMIC X-EROS #66) [Chinese] [沒有漢化] [Digital]
[BurstBomb.T (TKP)] Ties or Contract (Magical Halloween) [Digital]
(C89) [SUBCONTRACT STUDIO (luphis)] Luka Nee-san no Kekkon (VOCALOID)
(Mounanimokowakunai) [Kagi Node (Tsubaki Hara)] QB Contract Plan ~Let's Become Magical Girl~ (Puella Magi Madoka Magica)
[Mifune Seijirou] Elf Harem no Mori to Kozukuri Keiyaku | Baby-making contract with a harem of forest elves (COMIC MILF 2017-10 Vol. 38) [English] [sapphireblade] [Digital]
[TomCat (Keita)] Zecchou CONTRACT [Digital]
[Kamiya Zuzu] Jumon de Keiyaku | Incantation Contract (COMIC Anthurium 2013-05) [English] [desudesu]
[TomCat (Keita)] Zecchou CONTRACT 2 [Digital]
