[Kirisaki Byakko] Echidna-sama no Himatsubushi 2 Ch. 4 (COMIC Reboot Vol. 31) [Tigoris Translates]

Bored dungeon mistress Echidna passes the hours scouting intruders through her crystal ball, and when a busty young witch wanders into her lair, the resident slime wastes no time engulfing the girl in dripping, corrupting goo. The witch carries a secret bargain home to her sickly little brother—something precious lost in exchange for his cure—but the slime that claimed her isn't finished, following the siblings back to slither between the sheets. What unfolds is a gooey tangle of transformation and taboo, the shota pinned beneath a slick, shapeshifting slime girl with a soft chest and endless appetite while his sister moans right beside him as the dungeon's corruption soaks into family bonds.