This is really not mechanical ascension - Chapter 742 - 386: Upgrade and Inventory, Energy Level Touches X

In the age of fragmented reading, the warm love life with healing power is well received by readers. Gu Weiyi, is warm, good at study, and handsome. He is tender, caring, good at cooking and can even warm the bed. It is the love life between Gu Weiyi and Momo. Gu tries all means to win Momo’s love, while Momo is slow in love.

- Description from Novelupdates

In his old life, he was an assassin, invisible, efficient, and utterly alone.His only escape came from the pages of a fantasy novel, Crown of Thorns, and the character no one else seemed to understand: Lady Evelina D’Arclight, the proud and brilliant villainess fated to lose everything.After his death, he wakes up inside that very story, not as a hero, but as Cael Arden, a student at Eryndor Royal Academy. The world is just as he remembers it, right down to the woman destined to fall.But this time, he’s not a bystander.With a lifetime of deadly skills and the knowledge of what’s to come, Cael sets out to rewrite the story itself, to protect Evelina, rise through the academy’s ruthless hierarchy, and change a fate written in stone.As alliances form and secrets surface, the line between fiction and reality starts to blur.And in a world built on power and prophecy, he’ll prove that even a villainess deserves her happy ending.

An old man dies, torn by regret. Due to his high karma, he has “near-limitless possibilities for reincarnation”. He chooses to reincarnate in a fantasy world as a voluptuous futanari succubus with big tits and an irresistible smile.