Already got it on Steam... honestly... would of rather got it from here.
That said... are you planning on adding any other girls or story info? The comments made by the character suggest she is wondering this just as much as some of us players are.
Honestly not sure but I feel more like I am supporting steam platform more when i buy there instead of the artist... but that could just be in my head as I don't know the true reality of the situation. Would rather just meet the person face to face and hand them physical money to be honest.
