One Piece - I Am A Different Luffy! - Chapter 407 - 406 - Kuraigana Island.

He Lang died by his own hands for the sake of his imperial younger brother’s ambition, whom he loved. He was offered to be reborn in exchange for giving up his past romantic feelings. Reborn without the burden of his romantic feelings, he brings with him a manual to new worlds. He wholeheartedly followed the instructions of the manual to complete the tasks, not knowing that the originally slag gong was blackening…
He pleaded to his affectionate Emperor brother to release him, he pleaded to the paranoid prisoner next door, but until the end he remained baffled.
In the end, he discovered that the full name of the manual was – “Slag Shou Cultivating Manual”
Σ (っ ° ° °;) っ!

- Description from Novelupdates

Chika Satomi is a beloved and beautiful girl in the class known as the ‘Angel of Peace.’Ichinose Sōma, who is a fanatic about making sweets, asks Chika to be a taster for him after school when he makes some sweets.Saying things like,「I also want to try various things――」「…Ichinose-san’s embarrassed expression is really cute…」Sōma ends up watching over Chika, who keeps teasing him.Though usually passive, for some reason, Chika teases Sōma with a sly smile, showing her mischievous side only to him, and as a result, Sōma’s after-school hours become filled with sweetness!?A sweet and thrilling romantic comedy with a naughty angel woven together by confections!

“Leave, you're free. Don't ever come back here again.” She said, hoping he wouldn't return and she'll get to liveHael was shocked, “Are you abandoning me, My Lady?”Corvina Cory lived her first life like a typical villainess and the consequences of her actions were pretty obvious. She died at the hands of the person she was in love with. Yet she gets a second chance at her first life even though she didn't want it. She didn't want to face the man she was madly in love with again and she definitely didn't want to get killed again by him as well.

Su Xiao is a cold-blooded teenager who’s seeking vengeance for the death of his family, yet things ended up badly for him.

As he was taking his last breaths, he heard a voice calling him from dimensions, it was a strange system reaching him, asking him if he wanted to be saved, to be Reincarnated.

He just needed to accept a contract, Su Xiao didn’t have any choice but to do so, but he didn’t know what he signed up for!!

Traveling through worlds, doing extremely dangerous missions, collecting special items, leveling up, and even killing Protagonists…

But Su Xiao wasn’t any ordinary Contractor, Su Xiao was a Hunter!

The MC crosses over to: One Piece, Tokyo Ghoul, Naruto, Fullmetal Alchemist, Attack on Titans…

- Description from Novelupdates