魔法少女みるくＶＳ魔法生物ヌヌル～恥辱の粘液触手責め！～

Monsters have escaped from the magical world into our world, so Alf follows them and seeks help from the former magical girl Miruku who lives an ordinary life now. Monsters counterattack Miruku, and tentacles crawl into her body.

[From vndbreview]