Manyuu Hikenchou BOOB

From the letters page: Manyuu Hikenchou BOOB: a puzzle game about transformation, pregnancy and parody, developed by Kyra Visual Novels. It runs on Ren'Py and puts you in the role of a male protagonist. Status: still in development, version Ch.2 v2.1.0. Available for Windows, Mac, Linux and Android; 1.3 GB.

From the box: “In this exciting fanmade prequel, "Manyuu Hikenchou: Blossoms of our Bosoms," take control of Munemaga as you untangle intricate mysteries, charm potential brides, and master the power of karmic breast reading—all in the name of love, legacy, and legendary…”