Saike Mata Shite Mo is a Manga/Manhwa/Manhua in english language, Comedy 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

The story follows a unambitious introverted middle school student called Saike Kuzushiro. After witnessing the death of his childhood friend, Mikan Karatachi, in a road accident. He cries out to God and after a fall, Saike wakes up in bed the previous morning, the day of the accident. Will history repeat? Can he save Mikan? What power does he have to change the future?