MTL - Immortal Becomes a Stay-at-home Dad After Return - ~ 507 riding a tiger

Lucas was the last human in the universe.A cosmic-scale war had consumed humanity in massive destruction. As collateral damage, there were no longer any habitable planets. Lucas Alhamera, a scientist, attempted to terraform a planet resembling Earth called Antroseda but continuously failed.Overwhelmed by despair and the crushing weight of loneliness, Lucas attempted to end his own life using a euthanasia capsule. However, just before his life could be taken, he was abruptly awakened by a notification.[As the last of the dominant species, you have been chosen as the new Overseer of this universe.][The cycle of life must continue to preserve balance.][Select planet as the birthplace of the new species (default)][Select another planet...]With the Overseer System he had obtained, Lucas began what he had failed to do for hundreds of years: reviving a dead planet and creating a new race to succeed humanity.

The bad news, at least for me, is that I died. The good news is that I was reincarnated into someone else's body who lives in a cult full of beautiful women... but this cult forbids love. Well, one can't have all the good things. I thought I was safe until the worst happened. A system appeared that told me that I would die if a girl didn't accept my confession within a month... I have to get out of that cult now.Every 10 days I upload 15 chapters at once on Patreon.

Xue Xi is forced to fall in love at first sight with this dangerous man on their first meeting. With death being the only other option, she makes the first move:

Bubbles…Soft, fragile, and fleeting. They drift without purpose, bursting at the slightest touch.They aren’t weapons. They aren’t threats. Just harmless playthings, forgotten the moment they vanish.But what if bubbles weren’t so innocent?What if, in a world of Hunters—where magic shatters mountains and fists split seas—someone awakened a Skill based entirely on bubbles?A joke. A death sentence.Goblins would laugh.The weak would pity him. The strong wouldn’t even bother to look twice.But powers can hide secrets. And some truths are buried in plain sight.When a nameless F-Rank awakens the “Bubble Skill,” no one expects him to survive.Let alone rise.However, the indomitable spirit of River Faelan refused to die.Step by step, he climbed to the top—shattering every limit placed on a “mere” Bubble Mage.He proved them all wrong.And he’ll do it again,Even if it means starting from the very bottom… for one more time.