You probably already know about this, but...
https://f95zone.to/threads/milk-girl-sweet-memories-of-summer-v1-012-azucat.127913/
Its not that great IMO, but it can still be a good time if you're patient. However, I'd sooner recommend:
If you haven't, you must check out Drop Factory, by the same maker of Vitamin Quest.
Also the original Corruption of Champions by Fenexo has several lactation/ANR type of things. If playing a female character, you can start lactating and actually engage in a few nursing scenes, mainly imps and goblins. Marble is the main source of ANR for the player to receive, as you can actually have her join the party and have a daily nursing routine. There's a few other characters and scenes too related to milk too.