1.87 GB, and about 30 minutes of content. Idk what's going on with VNs lately, but I've been seeing a trend where a GB used to mean "meaty experience" but can easily now mean "a taste"
The GB games WERE Full HD, and use the same rendering software as the new ones. There's no reason for it. Tell me how the renders in your VN are better than the ones for "We Were Just Kids" or "Eternum"?
Edit: After taking another look at your renders, I can't see where you think yours are even particularly good. There are a lot of things I had to ignore to enjoy this story at all, like how clothing is always tucked up under the boobs, like that doesn't make a lick of sense, and the terribly unnatural poses at times.