Mark my words: this is going to be one of the best shoujos of this decade.
There is nothing about this story that is not perfect, the pacing is so buttery smooth, the CHEMISTRY BETWEEN THE LEADS IS SIZZLING (seriously, it is sooooo good!!) the ML's character is so freaking good and the FL is such a gem! no love triangles, no angst or over the top plot, just sweet romance between two gamers from unlikely worlds.
Seriously, you're missing out on an amazing story if you skip this one! 100/10
Yamada-kun to Lv999 no Koi wo Suru