The supporting character's harem is very normal - Chapter 303 Sakuth’s worries

There lived an extremely miserable man- he suffered from a terminal illness. But one fine day, when he left his miserable body, a certain entity grants him another chance- another life along with few gifts to help him in his journey.The man is transmigrated into the body of a young man into an ancient society. Watch how the man lives his new life and conquers the world.[This book will contain R18 scenes but do not expect it to be the theme of the book. It will be mostly based on strategies and expansion of empire. A small advancement in the technology can also be expected.]

My name is Lux, and I have traveled to the space-time matrix consisting of seven parallel Naruto worlds. The system shows that once the unification of the seven Naruto worlds is completed, I can instantly become immortal and live forever.The mission is very difficult, but luckily, I can cheat a little.So, I decided to take Senju Hashirama to see how Tobirama dies.Bring Madara to witness how his heart is ripped out by Black Zetsu.Show the young Hiruzen how he is killed by Orochimaru.Take Minato to see how Naruto is ostracized.Take Tobirama to see how the Senju and Uchiha Clans are wiped out.Maybe I can capture Boruto and return to see Naruto at his peak during the Fourth Great Ninja War?

Chu Qing traverses into the Martial World and discovers he is being hunted by an Assassin organization.Fortunately, he acquires an Assassin System.By opening the Treasure Chest, he can obtain various Martial Arts Secret Techniques.[Successfully opened, acquired Secret Technique: Ah Fei's Swift Sword!]

Bob is someone that hate people who praise Lord Buggy D. Clown as the strongest being on One Piece alongside God Usopp. His hate suddenly bring him to his death and even worse, his soul got transferred into Lord Buggy's body. How will Bob live as our Lord and Saviour Buggy?