The Shield Hero

You opened a book and was pulled to another world with 3 other people: a sword hero named Ren, a bow hero named Itsuki, and a spear hero named Motoyasu. You are the Shield Hero but no one likes you because shield users are seen as duds. Your shield has an orb that will absorb monster drops and level up. You can also put various things in the orb to unlock various shields. But be careful, everyone will be trying to ruin you. You are given 600 silver because, when people decided to join parties, no one joined you. Have fun and fight the waves that threaten the world. Also, you can’t use a weapon since you are a shield user, so you need to learn other kinds of offensive attacks. Magic is used here.