Dungeon of Knowledge - Chapter 73: Class Advancement

An ineffable rebirth, taking advantage of a mystical magic cube that was produced from rebirthing to pass through various worlds(anime, novel, movie, games, etc), collecting whatever I want to obtain!

- Description from MTLNovel

Overnight, the world's common sense changed.But then...“It's common sense that erect penises are cared for with wet pussies, right?”“Customer, shall I milk it for you? Or would you like to milk it yourself?”“We promised when we were young! That I'd become your ona**le!”This is more enjoyable than I thought?Harem | Erotic | Incest

The whole world is subjected to a highly dangerous standardised exam called the Global Examination. Answering questions by putting their lives at stake, they would live if they passed the test. Every month the exam will undergo reformation while, occasionally, it is random.