Manga by author Itaba Hiroshi - Status ongoing

The corporate slave lives with a teenage girl ...! Single old man x teenage girls junior high school student, under one roof! Masahiko Azumane is a man who works all night even on holidays and almost never catches a break from working, it is normal for him to return home in the morning. One day, a girl named Yuri, came to visit him, saying that she was the daughter of a former high school classmate. The two started living together under the promise of "until her mother comes to pick her back up"

*"I wish I had liked you when I was a high school student "*Osamu's girlfriend refused his proposal with these mysterious words. After that, in an accident, he time-leaps back to his high school days. He was trying to find her and make her fall in love with him again, but when he met her she had a twin sister! ??