The Entire Mankind is Acting As Me, I Shall Secretly Build a Battleship and Shock the World - Chapter 213 - Preliminary Mastery Of Alien Technology!

Qin Yichen returned to his youth with his memories of more than 10,000 years. Superb mental strength, advanced elixir formula, advanced martial arts.

- Description from xbiquge

This stands at the forefront of strategy guides to Life (a shitty video game)!

“Young man… if you could go back in time, what period would you like to be in?”

Our straight (?) bottom woke up ten years into the future and found himself on the bed of his childhood friend… At the start, the bottom was shocked to his very bones, but he soon quickly accepted this premise and found the whole situation to be rather amusing. Precisely then, the bottom once again went back to his timeline — back to when he and the top were just platonic childhood friends.

Landmines include but are not limited to: Sweet & naive bottom, a president story, logic is dead, slow-progressing romance, the protagonist’s name has too many character strokes, the names are hard to pronounce, too many gay characters…