The Qwaser of Stigmata (聖痕のクェイサー, Seikon no Kueisā?) is an ongoing semi-pornographic manga series authored by Hiroyuki Yoshino and featuring art by Kenetsu Satō. It is notable for its heavy violence and use of graphic fanservice, and in particular, the use of breast milk as an actual plot device.
The Qwaser is an anthropoid being who possesses supernatural powers affording them utility over a single chemical element. This specialized utility can vary widely in quality between different Qwasers and even under different circumstances; in order to maintain this specialized utility, it is necessary for a Qwaser to always have an adequate supply of soma. The soma is the sacred substance that fuels a Qwaser's elemental powers especially in battle. Whenever a Qwaser is replenishing its soma by breastfeeding from a nubile maiden, the Qwaser is draining away the maiden's life force through the breast milk whose quality and potency can be magnified (or diminished) by the situational emotions of the maiden not unlike how coffee or tea is sometimes modified by adding cream or sugar. The personality of the quarry maiden also plays a role as well; although in the case of very childlike maidens, this ends up working to the Qwaser's detriment. Even then, the perspective is that the benefits are worth the risk. In the manga, when the Qwazer Aleksander "Sasha" Nikolaevich Hel takes the Soma in order to fight, appears Theotokos of Tsarytsin: the legendary icon depicting the Virgin Mary breastfeeding an infant Jesus fabled to alter the homeostasis of the world. Below is an uncensored extract of an episode where Aleksander "Sasha" Nikolaevich Hel takes the soma from the breast of a young virgin girl (might take some time to load, depending on your bandwidth).