Well, of course you want to see the events

Right now, Issei felt like dark magician as he controls his familiar.

The Fallen angel is trap under Slime-Taro's tentacle grasp, it's form solidfy by it's owner's will. The slime look more solid compare to before, like jello. It slid under Mittelt cloth and into her panties causing her to moan.

"It seems I can control it's acid," Issei tries to see how far he could control, and it seems he could affect even the properties of the slime. Mittelt face became red as she breath hard, her body felt hot for some reason.

Maybe there's some aphrodisiacs effect?

Though that's just for testing, he knew why he chose the slime. A few moment, the cloth start to dissolve, as it reveals his servant naked skin and the tentacle that wrap around her body.

Issei uses his mind to make the slime rub her clit, teasing her.

"Kyah..." She squeaks as the tentacles keep rubbing down her croth, her butt rub by the tentacles from behind as if it was a tongue. This really looks like something straight out of tentacle hentai.

He focuses more on his thought as the tentacles in front of him pop out multiple tiny tentacles like fingers and then began to play with her now pointy nipples.

"Have mercy on this servant, master...." Mittelt begs, but Issei is to into his thought of what he could do.

Could he relay some simple command to it? Can he link his mind for shared information?

He has more things uncovered, Slime-Taro had become above of what he dream of him(which is only a few hours he admits) and the night is still long.

Luckily he has two "volunteers".

"Eeeeep!! It's entering my butt!!" Mittelt yelp as the slime did something Issei did not command(well, that just makes him even more proud).