Impregnate Her at Eikan Beach, Then Swallow Her

While wandering on a beach, Miho is attacked by a large floating ray-like monster called Belpiro, which swallows her upper body and fills her mouth with saliva before consuming her. Inside its body, its tentacles and thick penis subject her to intense sexual stimulation, causing her breasts to enlarge and lactate. Belpiro forces its penis into her cervix and its tentacles into her nipples, repeatedly thrusting into her womb and filling her with semen. As the assault continues, Miho's mind reaches its limit, she is impregnated, and Belpiro completely swallows her. The final setting pages explain how monster fluids prepare women's bodies, breast enlargement during sexual arousal, and the extraction of mana through impregnation and swallowing, followed by illustrations of Miho being swallowed and showering.