MTL - Non-famous Actor - ~ Four hundred and thirty six, please help

In a world transformed by spiritual energy, Kent, an underdog with an F-rank physique, gains the mysterious SSS-Rank Cultivation System. With the ability to copy and combine powers, he begins his journey to rise from the bottom.By his side is Nima, his sharp-witted younger sister with a rare Soulbinding ability, making her a prodigy. Together, they navigate a world filled with evolving beasts, ancient ruins, and hidden dangers.As they uncover the mysteries of the Emerald Vein and face powerful factions like Nexus, Kent must master his fire-based abilities to protect his sister and rise to power.Can they survive the chaos and claim their destiny? Find out in *Infinite Ascension: My SSS-Rank Cultivation System Made Me Too OP in Modern World!*WSA 2025 Contest.

“From today onward, you’ll take your brother’s place and take over the inheritance of the Gu family!” With her mother’s declaration, she became her twin brother’s substitute.

Dressed as a man, but unwittingly enticed a lot of sisters!

Incidentally, she also captivated the younger sister of the most powerful authority in China, shouting to marry her!

Ming Shao was furious: “From now on, you will follow me. I will train you to be a qualified brother-in-law!”

Since then, she eats with Ming Shao during the day and lives with Ming Shao at night.

She has always thought that Ming Shao treats her as a prospect brother-in-law, but one day, Ming Shao pushed her down the bed and plundered her mouth!

Hey! Didn’t he say he wants her to be his brother-in-law, how come he turned into her boyfriend?

- Description from Novelupdates

An ineffable rebirth, taking advantage of a mystical magic cube that was produced from rebirthing to pass through various worlds(anime, novel, movie, games, etc), collecting whatever I want to obtain!

- Description from MTLNovel

Usami is a beautiful classmate with good morals and top grades. At school, she views Sakuto as her rival. But when he bumps into her after school, he sees a different side of her. She was playing at an arcade after classes, and she had this innocent smile that one couldn’t imagine on her at school.For the sake of getting along with her, he gets close to her at school and then plays together with her after school. They each have their places where they can deepen their bonds, and at last…This is the start of a heart-warming love triangle romcom!