When I Got Base Magic Through a Class Transfer, a Harem Life Started Surviving on a Remote Island, But It Seems I’m the Only One Who Can Live Comfortably with the Girls

I, along with my classmates, was picked as a “hero candidate.” To become a real hero, it looks like we have to pass some trials. The trials take place on a remote island full of demons. We start living a dangerous survival life while working with, and sometimes against, each other. Each hero candidate gets their own special magic, and the magic I received is “Base Magic.” It’s a growth magic that lets me teleport to a private base and slowly expand it. As I keep living on this isolated island, more and more girls start living with me. We happily face the trials together while sharing life at the base. Starting from scratch in an empty base, an otherworldly shared life begins. On this island full of demons, I’m the only one who can provide things like a fridge and a big bath, so the girls seem really attached to me. Some of my classmates are hero or prince of blue flame, but it seems like I’m the one who’s popular.