My Boyfriend Is A Dragon - Chapter 256 - Good Times

Yang Feng somehow transmigrated into a different world and received a legacy of an ‘ancient high tech’ family, which does not directly raise his power, but gives him the technology to build things which are way more advanced than the seemingly medieval world.

But to build something you need resources and energy. To receive resources you need strength. To gain strength you need knowledge. To gain knowledge you… need strength? or a background? Or maybe a fully armed army of high tech robots who aren’t afraid of death?

But is this legacy really for him to keep?

- Description from Novelupdates

As a precocious child, Lycoris suffers from a strange sense of deja vu. On the day her father told her about her fiancé, she realizes that her fiancé was a character from an otome game she once played in a previous life.

In a universe where starships rule supreme and galactic empires clash for dominance, Kallus, a visionary gamer and strategist, finds himself thrust into an extraordinary reality.Awakened aboard the [Obliterator-Class Star Dreadnought], a vessel born from his own imagination but perfected by a Supreme Being, Kallus must rise to command a fleet that could shape the fate of the cosmos.With a ship forged from mythical adamantium and [mithril alloys], powered by a [Transcendent Dark Matter Engine], and armed with weapons capable of annihilating entire fleets, the Obliterator is more than a warship—it’s a legend incarnate. But Kallus is not alone. Alongside him is the Red Empress, an advanced AI infused with a power of creation and knowledge itself, guiding him with missions that unlock untold power and potential.

The male student, Fukai Nagamasa, ignores his studies for college entrance exams in favor of following the path to chuunibyou. As he fainted during night cramming session before the exams, he realized that he was transported to a parallel world as a feudal lord in the Sengoku Era. Not to mention that suddenly, he was marrying the sixth Demon King, Oda Nobunaga’s little sister, the one who was purported to be an unrivaled beauty?