The Strongest Brother Lost His Memory - Chapter 16Vol 2.

I woke up in this world with a System and a sword. Without hesitation, I chose to complete the princess’ quest with my weapons: Arrogance. Cunning. Pride. I will lead guild Sol Invictus. Denizens of the 7 hells, respect me. Servants of the 11 heavens, know fear. Guild Invictus, know the suffering of training so you can wrest victory from the jaws of those who dare doubt you.

This is a story about a snake named Tycondrius waking up in a fantasy world of swords and sorcery. There is action, violence, unapologetic murder, and arrogant displays of power. There is an emphasis on combat growth as well as psychological growth on more than a few members of Guild Invictus. There is camaraderie and also the inevitable comedic dialogue amongst manly men. There are even elements of romance and Tycon running away from terrifying, powerful women. (Did you know most female snakes eat their partners after mating?)

Before going to college, an ordinary high school student went to celebrate and got drunk. When he woke up, he found himself in a completely different world. There was a big sect, the approaching sect entrance examination, a slum where his body’s previous owner lived, and a shared memory about a missing young girl.

When he got tangled in a fight with a few punks in this different world, he fell off a cliff and miraculously found himself still alive, with two more voices ringing inside his head. They were Sword Master and Saber Master. In the company of them, he continued to find out more about this whole new world. He took the sect entrance examination, entered the sect, met a strange man in black, and even participated in a major competition of the sect to have a chance to win over his peers!
In this whole new world, he was born again and got to explore the fantastic martial world!

- Description from Novelupdates

Traveling through the world of pirates, he also became a noble Celestial Dragons.Lakeman just wanted to enjoy a luxurious life.Unexpectedly, as soon as he attended an auction, he met the three Boa sisters who had just been captured, and the binding system was awakened at the same time.If you bind a genius, you can get the other person's daily practice feedback.【You have bound Boa Hancock.】【You have bound Borsalino.】[You have bound One Piece’s deputy, Silvers Rayleigh.】【You have bound Doflamingo.】“Originally, I just wanted to recruit talents from all over the world, but why are there more and more beautiful girls?” Lakeman looked at the group of beauties beside him and fell into deep thought.