Disclaimer: This is a non-profit Fanfiction Parody. I do not own「Tensei Shittara Slime Datta Ken」and 「Bungou Stray Dogs - BEAST」 Please support the official release. Yes, it's BSD × Tensura. Guess who gets reincarnated? Dazai gets reincarnated as Diablo. Fun. Gotta prepare for that OOCs *********************** Whenever I was asked what I wanted my first impulse was to answer "Nothing". The thought went through my mind that it didn't make any difference, that nothing was going to make me happy. Though, for now I have no need for this thing called "happiness" at all. Well, that was what I thought. For all the schemes and handiwork I did in the past, I never thought the underworld would be an endless void... Just for a second though, I realized it was not the thing I was seeking. *Ding* 《Unique Skill, 『Great Wiseman』 successfully acquired.》 How unsettling... A/N Warning: Suicidal thoughts ahead.

Because not most of people does this character crossover so I try to make one for fun! xD

... Yeah it's a bit weird I just have a sudden idea about it when I write the other story so here we are Guy and Velzard has been together for millennia and suddenly a Unique slime appeared on the ice castle How will their live goes? I don't know heheh, we'll see how it's gonna go on the way I guess

Lumine was minding her own business when a Fatui suddenly ambushed her. That very Fatui was a Harbinger, Rank 3 "The Doctor". With her consciousness fading she began to assume the very worst. She thought she heard a voice before she completely became unconscious. "Get..away...from-...sister!" When she had come to again, all she saw around her were rocks and rock walls in an unbelievable darkness. It was there that she met a slime and began her "Journey" on Tensura.