Monster Strike
モンスターストライク (original)
Ren Homura returns to his former residence, yet he feels very uncomfortable: he possesses no memory of having lived there. Without warning or his permission, a game called "Monster Strike" installs itself into Ren's smartphone; monsters of the game then literally fly out from his smartphone and start fighting on streets. Watching the fighting in amazement, Ren starts picking up his lost memories.
Starring Daisuke Ono, Yoko Hikasa, Yusuke Kobayashi, Lynn, Jun Fukushima, Taishi Murata, Ikumi Hayama, Eri Suzuki
It's a animation and action & adventure show, and has a rating of 5.2 out of 10 from Imdb which is fairly okay for this kind of show.
Watch it here
Not found streaming from United Kingdom.