Cubesoft is the company behind the ren'ai game (dating sim) Sight. Their primary product is pornographic video games. LockArt is a recently acquired subsidiary that owned Sight and is the studio working on its production.
Current LockArt employees include Matsui Takeshi, possibly the producer or supervising engineer, and Ryouya Sayuri, the character designer, who was recently revealed to be Kumakuma (Strip 1083). Nanasawa Kimiko was recently hired to provide the voice of Kotone.