This walkthrough is for the Aikagi visual novel by Azarashi Soft and Frontwing, available for English download on Steam.
A free 18+ upgrade DLC is also available for download here. The 18+ version of the game contains censored images.
Aikagi has just 1 heroine as this is a kinetic novel. Completing the story once will reward you with all the CG.
You won’t need any saves for Aikagi.