I will add proper descriptions and cover artworks later... (>_<") — MeioseiP

Cosmic Quest (1—3) (RPG game-series) (10+)

• Cosmic Quest 1: Space Mecha!☆

• Cosmic Quest 2: Into the Darkness

• Cosmic Quest 3: Madness Festival

Cosmic Quest 4: Super Star (RPG game) (10+)

Tanoku (shmup game-series) (16+)

• Tanoku 1: Pulque Forest Party!☆

• Tanoku 2: Beast Girls Attack!☆

• Tanoku 3: Legendary Sun Bird

• Tanoku 4: Lunatic Army

Bijou Story: Diamond Squad (RPG game) (10+)

Bijou Story 2: Crystal Kingdom's Curse (RPG game)

Chrysanthemum Night (manga/webcomic) (16+)