The plot is too mainstream. The last survivor is the daughter of the MC. Then the mister villain there will kidnap the girl which then makes the MC save her without a sweat.
I hope it won't go like that....
When the scanslator is "Japanese Unloved Manga" I need to be wary of the heartbreaking scenes.
edit: oh but I usually followed the manga, like I do with the Ingoshima manga.
talking about summoners, there was this manga I've read when I was in Japan. The story is about your everday high school student who got hit by truck-kun after rejected by a girl. Then he got reincarnated to another world and become a summoner with ulterior motive of summoning beautiful spirits...