MTL - HacKer - ~ Final-066 is unexpected!

Hyde arrives in a doomed world with nothing but his body and fragmented knowledge of the future from a game he once played. He has no grand ambition—why try to save a world already destined to fall? Survival is enough.That is, until he discovers his sister is also transported into that world.However, only he hears the Melody of Nightingale and receives the power to survive.[You have established a connection with The Forgotten Hollow.]Awakening as a Resonant—an elite group with supernatural abilities—he is thrust into a conflict between two worlds. Armed with the authority of space and time, he vows to protect his powerless sister at all cost, even if he has to fight against the Mirage creatures, other Resonants, or even Gods themselves.

One day, two forum posts titled “I Seem Unsuited for Dating” appeared on Promontory Forum’s Feelings board nearly at the same time.

User A: 「I have a severe case of mysophobia and possessiveness. I cannot accept it if my girlfriend has had relationship experience. I went to see a psychiatrist, but I haven’t improved. I might truly be unsuited for dating.」

User B: 「I think I might be unsuited for dating. I very much enjoy the ambiguous phase of sounding out each other’s feelings, but after becoming official, if they want to hug me, or perhaps kiss me, I will immediately feel nauseous.」

Internet User: 「I beseech that the two of you be together. Don’t go and harm anyone else.」

- Description from Novelupdates

When people die, where do they end up to?I don't know about anyone else, but when I died, I arrived at the strangest Heaven of all times. And I got a chance to reincarnate with all of my memories!Jackpot!If you look away from the fact I had to reincarnate as a damn monster which is the lowest of all the bottom feeders? And I had to represent one of the worst goddesses ever!?And to make things worse, my “birthplace” was a freaking Dungeon! And not your everyday Dungeon with level 1 slimes and goblins, but a freaking Dungeon-turned-world-destroying-facility!Still, you gotta work with what you have. So see me how I survive in this crazy new world!!...But I promise I won't be mad if the bosses get debuffed. No? Damn...

In a world where everyone is undergoing their profession's transition, I've surprisingly awakened to two professions.Moreover, I've also awakened a defiance lifestyle profession.Preserve high-quality items? I'll just synthesize them.Preserve high-quality skills? I'll synthesize those as well.Preserve high-level pets? I'll keep synthesizing. Wait, why is this beast-girl so large after the synthesis?Let's start by synthesizing three “Skeleton Summonings.”Synthesize into—The “Undead Army.”Now, let's synthesize three Dark Wands.Synthesize into—The “Death's Scepter.”In the grand interspecies gaming contest of the universe, can we, humans of the Solar System and Earth, ascend to an even broader stage?......