World's End: My Keyword is One More Than Others - Chapter 2: Self-sacrifice

[The 3000th Descent of Mystery is about to begin.][This is your only chance to redeem yourself.]When the whole world was in danger, Wang Teng activated a unique talent.It was the Rank SSS talent - Inequivalent Exchange!He was not purchasing things for free, but the exchange was not equivalent.[Exchange successfully. You used half a bowl of cup noodles. With your Rank SSS talent, you may retrieve an unlimited supply of cup noodles.][Exchange successfully. You used a bottle of Sad Breeze wine to exchange for the Star Shifting Method.]…From then on, Wang Teng activated a new exchange system.

Wang Bin unexpectedly gained the ability to travel between the post-apocalyptic world and the real world. In the apocalypse, he organized a powerful team and continuously transported gold back to the real world.Using the gold from the apocalypse, Wang Bin built a commercial empire in the real world, eventually becoming the wealthiest person on Earth. His every word and action could influence the rise and fall of entire nations.At the same time, his development in the apocalypse was equally impressive.Through countless brutal battles, he ultimately established the largest and safest settlement in the dying apocalyptic world, making an extraordinary contribution to the survival of humanity.

After dying in an oddly anticlimactic vending machine accident, Kazuki Ren is reincarnated in the demon realm—not as a hero, not as a villain, but as the only human male student enrolled at the mysterious Academy of Ruin, a school where all the professors are demon lords and all the students are powerful, beautiful she-demons.Ren is told he has one task: survive.But there’s a catch. The Academy’s darkest secret is about to awaken, and Ren holds a hidden power that could either destroy the demon world... or rule it.Now surrounded by seductive demons with hidden motives, eldritch tomes, forbidden dungeons, and twisted exams, Ren must master his ability—or be consumed.Magic, mystery, danger, and temptation await in this dark academia harem fantasy.