Touya Mochizuki is an ordinary fifteen year old boy... until he is accidentally killed by God! He can't have his old life back but as compensation God brings him back to life in a fantasy world with boosted magical powers. He is allowed one wish and chooses to take his smart phone with him. Once in this new world he meets Elze and Linze Silhoueska, two sisters who teach him about the use of magic... they are surprised that he can use all seven types of elemental magic as well as 'null magic' once he has observed somebody else using the spell. With his amazing powers he is quickly helping many people and befriending people in high places... he is also acquiring a harem of female friends who all seem to be attracted to him.
This could easily be just another 'ordinary person in a fantasy world' series with in overpowered protagonist but thankfully it manages to be better than that. It doesn't try to dodge genre stereotypes; instead it revels in them. The characters are likeable and it is fun watching Touya learning about this new world, gaining new skills and defeating various threats. Towards the end of the series the fan service increases somewhat with the near obligatory beach episode. The animation and character designs are pretty good with the sort of look one would expect from the genre. The series ends in a way that hints at more to come; if there is eventually a second season I'd definitely watch it. Overall I wouldn't say this is a must see but would definitely recommend it to fans of the genre.
These comments are based on watching the series in Japanese with English subtitles.