I'm trying to look for this manga. It's Isekai. Basically this guy got isekai'd into the forest, and to survive, he killed a rabbit (the scene was pretty funny). He found this cave/ruins and found books or something. Anyways, by reading those books, he instantly learned the magic spells and from there I don't exactly remember what happened. That was the entire first chapters summary, hope that helps!
I'm trying to look for this manga. It's Isekai. Basically this guy got isekai'd into the forest, and to survive, he killed a rabbit (the scene was pretty funny). He found this cave/ruins and found books or something. Anyways, by reading those books, he instantly learned the magic spells and from there I don't exactly remember what happened. That was the entire first chapters summary, hope that helps!