Kisei Shokushu Otoko ni Netorare Modaeru Kazoku

One by one, everyone important in the protagonist's life is seduced into a sweet abyss of corruption by a schoolmate infected by parasite tentacles.... The protagonist is an ordinary student. He lives at home with his mom, his younger sister and his girlfriend. One day something falls from the sky and burrows into his schoolmate (kouhai). The next day the protagonist comes to school. The kouhai is noticeably absent. There's no way he could have known. The kouhai has been infected by a vicious tentacle parasite that preys on women. Before he knows it, wicked tendrils are coiling around his family... The poison swims within the bodies of his mom, sister and girlfriend, engulfed in a maelstrom of toxic pleasure. * His precious love... his whole family... drowned in parasyduction The tentacled menace infects his very home. Corrupting touches saturate so deeply, they pray only for more pleasure...... * Deflowered slits, anal expansion, two holes at once, enema, aphrodisiacs and more A plethora of torments corrupt the heroines. Their fate: to undulate on the squirming tentacles toward an infinite horizon of bliss...