Life Dive is a Manga/Manhwa/Manhua in english language, Ability series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

When I was young and reckless, my soul inadvertently crossed into another person, unintentionally altering the course of the world. Thus, I swore never to use my supernatural abilities again. However, in order to save the life of my critically ill younger sister, I had to break that vow. I used my powers on the nurse, Jinzhi, who was taking care of my sister, and crossed over to Jinzhi’s childhood to play her role and experience her life. Through this, I discovered that beneath Jinzhi’s gentle and elegant facade, there lay dark and mysterious secrets…