The two girls he rescued after time leaping back for story are two rich girls with a high profile background. They interacted during the hospital and elementary before moving away abruptly cuz their mom wants them to have the best education or something. The little sister is the spoiled princess type while the older sister is the cool-headed literary type. The little sister does shed off the spoiled part after growing up.

The silver-haired girl is another girl MC met at the hospital, but unrelated to the kidnapping incident. She's supposedly Japanese, or at least can speak Japanese. She has silver hair cuz of albinism or some genetic condition. At first, she was very anti-social because of her history but opens up to MC. She later becomes MC's step-sister after their parents (MC's dad and her mom) marries each other. Cuz of this, she spends the most time with MC. She act as the clingy sister who secretly wants to marry her brother type charactert you see all the time. Very jealous and very scheming. She hates the two sister for abandoning MC (even tho they couldn't do anything).

There's also MC's deskmate who's very developed despite being a middle schooler. Also moved away abruptly during middle school and reunites after in high school.

The aunt of the two sisters who may be a little too touchy-feely. Sure, kinda creepy she might like MC despite being way older than him, but hey MC mentally is a grown ass man. Past that, well, she doesn't have many appearance. Only brief mentions. It only implies that she and MC have talked and texted over the years.

The last one so far is MC former middle school teacher. Tho, I shouldn't really describe her like that. She originally is a programmer for MC's company (? Or, is it his father's? Still, he lead it cuz future internet knowledge) who then becomes a teacher (not entirely sure why, but she does say she needs money for her mother's health). Eventually, she quits being a teacher after finding out MC's identity as being roughly her boss and works as a CEO in his stead (cuz he's still just a kid).

these 3 girls were suppose to die, and their continued existence has a butterfly effect on this new timeline.

regular slice of life story where mini-chad lives his best life, utilizing the internet to become a rich child in what appears to be a completely normal version of reality that follows the historical trends of our own. He does some normal martial arts on the side for personal self improvement but there doesnt seem to be any indication of cultivation or magic at all after 2 volumes. It's kind implied he's slightly stronger than he thinks he should be but he doesn't ever do anything actually super human.