Dajiaochong Manga

As you can see, the title tells all.

School Beauty's Personal Bodyguard summary: When an S-class elite assassin-raised captain of a special ops suicide squad comes home from a high-stakes Africa mission, he finds himself offered something that could potentially set him up for life- a curious assignment that he could use to finally exit his days of war and slaughter. Then placed into a high-school setting, Lin Yi is tasked by the chairman of a top-tier multi-billion company with bodyguard duty for non-other than his own daughter, a certain little Miss of said high-school. His enemies, once ranging from drug lords, mafia bosses, political figures, and national leaders, are soon replaced with spoiled kids who happen to have rich papas and mamas, and Lin Yi finds his intense expertise and high-threat skillset misused, and very underwhelmed But he does get a harem cast as diverse as his old enemies, so Lin Yi decides that, for the sake of messing around with girls as an invincible entity in a down-leveled environment, leaving his bloody and death-filled war days behind is something hed definitely want to strive for.

Doctor or charlatan? Resourceful and clever, Ying, an imperial doctor of Yunqin Dynasties is persuaded by her master to become the personal doctor most useless and wicked prince. Now the place is bustling with troubles.

The second generation of gangland time-travelled as the pirate king's son in Galaxy. And the pirate king was just killed. Well I thought that in the world I should have some special ability or power, make money and live a rich life again. But since the eggs I saved accidentally hatched, it seemed that I not only have a dragon but also a husband? No no no, I like girls obviously.

Young man, you seem to be of great shape and gifted, you are the one in a million marvelous boy. Just come and become the legendary King of Warriors! The great task of safeguarding world peace is lying on you!

A snake-woman?! A flower fairy?! A fox spirit?! Why have you all appeared on my bed? I'm begging you, leave me alone! I just want to be a normal high school student, ahhhhhh!

A powerful zombie boy revived. In order to be able to live like humans, he left his grave and started out a journey, but got involved in a big dispute...

The demon king, who had been sealed for three thousand years, once again invaded the mortal world, but unexpectedly he fell into the greatest crisis of his life! Guns vs magic, mobile phones vs elves... Ignorant demon king set out a new aggressive adventures in modern human society.